Understanding the iPhone's Little Red Light Indicator
A small red light on your iPhone can be a moment of confusion, prompting questions about its purpose and whether it indicates a problem. While iPhones are known for subtle visual cues, a persistent or unexpected red light is typically tied to specific operational states or privacy features. This indicator is not a common hardware failure symptom but rather a notification system designed to inform you about your device's activity. Understanding what it signifies is key to diagnosing any potential issues or simply recognizing normal device operation. For many users, this light might appear momentarily, while for others, it could signal a more continuous function that needs attention.
The primary function of a red indicator on modern iPhones is related to privacy and active components. Unlike older devices that might have used colored LEDs for battery status or charging, the current implementation is more sophisticated, often appearing as a small dot or segment on the screen itself, rather than a physical light on the casing. This distinction is important, as it means the 'little red light' you're seeing is likely a software-driven visual alert on the display, most commonly associated with the microphone or camera being actively used by an application.
- Red light usually indicates active microphone or camera use.
- It's primarily a privacy indicator.
- Check which app is using these features.
- Troubleshooting involves app management and restarts.
When you encounter this red indicator, your first thought should be about which applications you are currently using or have recently used. iOS is designed to be transparent about system resource access, especially concerning sensitive hardware like the microphone and camera. Therefore, the presence of a red light is a direct signal that something is actively listening or watching. This is a deliberate design choice to enhance user awareness and control over their device's privacy. It’s not a warning of impending doom, but an informative status update.
The context in which the red light appears is crucial for interpretation. Is it a small dot in the status bar, or does it appear over an app's interface? The location and behavior of the light provide vital clues. For instance, a red dot in the top-right corner of the screen, near the Wi-Fi or cellular signal icons, is a standard iOS privacy indicator. Its appearance means an app is currently using your microphone or camera. If you are in a phone call or using a voice memo app, this is expected behavior. If you are not actively using such features, it becomes a prompt to investigate further.
The Primary Role: Privacy and System Activity
The most common and significant reason for a little red light or dot appearing on your iPhone is to signal that an application is actively accessing your microphone or camera. This is part of Apple's commitment to user privacy, ensuring you are always aware when sensitive hardware is in use. The indicator serves as a constant reminder that your iPhone is capturing audio or video, prompting you to verify that this access is intended and necessary. It's a direct communication from the operating system to you, the user, about what your device is doing in real-time.
When you see this red indicator, it's not necessarily a sign of a malfunction. Instead, it's an alert. If you are on a FaceTime call, recording a voice note, or using an app that requires camera access (like a social media app for a photo or video), the red light is functioning as designed. The system is informing you that the microphone or camera is active. However, if the red light appears when you are not intentionally using these features, it warrants further investigation to ensure no unauthorized access is occurring or that a rogue app isn't misbehaving.
Identifying the Source: Which App is Using Your iPhone's Mic or Camera?
The crucial step in understanding your iPhone's little red light is identifying which application is responsible for its appearance. Since the indicator primarily signifies microphone or camera access, you need to determine which app is currently utilizing these resources. iOS provides built-in tools to help you pinpoint this information, making it easier to manage your device's privacy and ensure everything is functioning as intended. This diagnostic process is straightforward and can often resolve the mystery behind an unexpected red light.
When the red light is active, swipe down from the top-right corner of your screen to access the Control Center. If the red indicator is for the microphone, you will likely see an orange dot or an icon indicating that the microphone is in use. For camera access, you'll see a similar indicator. Within the Control Center, you may also see a notification or an icon that explicitly names the app currently using the microphone or camera. This is your most direct clue. If you're not actively engaged with an app that should be using these features, this alert becomes a signal to investigate further.
Using Control Center for Real-Time Insights
Control Center is your first line of defense and your most immediate diagnostic tool when the red light appears. Swipe down from the top-right corner of your screen to reveal it. If an app is actively using your microphone, an orange dot will appear in the status bar, and within Control Center, the microphone icon might be highlighted or an app name associated with its use may be displayed. Similarly, if the camera is in use, a red dot will appear in the status bar, and Control Center might provide context. This quick check allows you to see which application is requesting access to these sensitive components at that very moment.
This feature is incredibly powerful for privacy awareness. If you see the red indicator and then check Control Center to find an app you don't recognize, or an app you thought was closed, using your camera or microphone, you've found your culprit. It means that app is currently engaged in recording or listening. This immediate feedback loop is designed to give you control. You can then decide whether to continue using that app, close it, or investigate its settings further to understand why it requires such access.
Checking the App Privacy Report
Beyond real-time monitoring via Control Center, iOS offers a more historical view through the App Privacy Report. This feature, found in Settings > Privacy & Security > App Privacy Report, provides a detailed log of which apps have accessed your location, contacts, photos, microphone, camera, and other sensitive data over a specific period (typically the past seven days). It lists each app and the types of data it has accessed, along with the date and time of access. This is invaluable for identifying apps that might be accessing your microphone or camera more often than you expect or realize.
The App Privacy Report is an excellent tool for auditing app behavior. If you notice a red light and can't immediately identify the source via Control Center, reviewing this report can reveal patterns. You might discover an app you rarely use is frequently accessing your microphone in the background. This detailed breakdown empowers you to make informed decisions about app permissions, allowing you to revoke access for any app that seems suspicious or unnecessary. It's a proactive way to maintain your digital privacy.
Troubleshooting Common Causes of the Red Light
When the little red light on your iPhone appears unexpectedly or persistently, several common causes might be at play, ranging from normal operational features to potential software glitches. Understanding these causes is the first step towards resolving the issue and regaining control over your device's indicators. Most often, the red light is an informational cue, but when it's not tied to an activity you initiated, it signals a need for troubleshooting.
The most frequent reason for the red light is an application using the microphone or camera. This could be a video call, a voice recording, a social media app, or even a background process like system services that require access for specific functions. However, sometimes apps can glitch, leading to the indicator staying on even after the intended function has ceased. In such cases, a simple restart or a more targeted approach might be necessary.
- Restart your iPhone to clear temporary glitches.
- Close and re-open apps that seem to be the source.
- Review and adjust app permissions in Settings.
- Check for iOS updates for potential bug fixes.
Beyond app usage, the red light can sometimes be linked to specific system functions or accessories. For example, if you're using an external microphone or a specific accessibility feature, it might trigger the indicator. It's also possible, though less common, that a software bug within the iOS operating system itself could cause the indicator to display erroneously. Therefore, a systematic approach to troubleshooting is essential.
The core principle when troubleshooting is to isolate the cause. This usually involves checking active applications, reviewing permissions, and ensuring the system software is up-to-date. By systematically working through these possibilities, you can effectively identify why the red light is appearing and take appropriate action to resolve it.
Force Quitting Misbehaving Applications
If you suspect a specific app is causing the red light to stay on, force-quitting that application is often the most effective first step. This process completely terminates the app and its background processes, which can resolve temporary glitches that might be causing the indicator to remain active. To force quit an app on iPhones with Face ID, swipe up from the bottom of the screen to reveal the App Switcher, then swipe up on the app's preview card to close it. On iPhones with a Home button, double-click the Home button to show the App Switcher, then swipe up on the app's preview.
After force quitting, wait a few moments and observe if the red light disappears. If it does, you can then try reopening the app to see if the issue recurs. If the problem returns immediately upon reopening, it might indicate a more persistent bug within that specific app, or that the app is designed to re-engage the microphone or camera immediately upon launch. In such cases, you might need to manage its permissions more strictly or consider uninstalling and reinstalling it.
Restarting Your iPhone
A simple restart can often resolve minor software glitches that might be causing the red light to appear incorrectly. When your iPhone restarts, it clears out temporary files and resets active processes, which can clear any errant signals causing the privacy indicator to remain on. For iPhones with Face ID, press and hold either volume button and the side button simultaneously until the power off slider appears. Drag the slider, wait for your iPhone to turn off, then press and hold the side button again until you see the Apple logo. For iPhones with a Home button, press and hold the top or side button until the slider appears, drag it, then press and hold the side button until the Apple logo appears.
This action is a fundamental troubleshooting step because it refreshes the entire operating system. If the red light was caused by a transient software anomaly, a restart is usually sufficient to correct it. After your iPhone has fully rebooted, check if the red light is still present when you are not actively using any applications that require microphone or camera access. This 'soft reset' is non-destructive and can fix a surprising number of minor issues.
Updating iOS for Bug Fixes
Software bugs are a common source of unexpected behavior on any electronic device. Apple regularly releases updates for iOS that include bug fixes, performance improvements, and security patches. If the red light issue is due to a software defect, an iOS update is very likely to address it. To check for updates, go to Settings > General > Software Update. If an update is available, follow the on-screen instructions to download and install it. Ensure your iPhone is connected to Wi-Fi and has sufficient battery charge, or plug it into a power source.
Keeping your iPhone's operating system current is vital not only for addressing issues like the red light indicator but also for maintaining optimal security and performance. Developers often fix issues that users report, and the App Privacy Report itself is a feature that has evolved with iOS updates. Therefore, ensuring you are on the latest version of iOS is a critical step in troubleshooting and preventing future problems. It’s a proactive measure that protects your device and its functionality.
Managing App Permissions
If you identify an app that is consistently using your microphone or camera, and you don't believe it needs to, managing its permissions is the next logical step. Go to Settings > Privacy & Security. Here you will find sections for Location Services, Contacts, Calendars, Reminders, Photos, Microphone, Camera, and more. Tapping on 'Microphone' or 'Camera' will show you a list of all apps that have requested access. You can then toggle off access for any app that you deem unnecessary or suspicious. For example, if a game you downloaded is asking for microphone access, you can deny it.
Be mindful when adjusting permissions. Some apps genuinely require microphone or camera access to function as intended (e.g., video conferencing apps, voice assistants, camera apps). However, for many other applications, this access might be excessive or even indicative of unwanted data collection. Regularly reviewing and adjusting these permissions is a powerful way to maintain privacy and can directly resolve situations where the red light appears due to an app overstepping its boundaries.
When the Red Light Indicates a Hardware Issue (Rare)
While the little red light on your iPhone is overwhelmingly a software or privacy indicator, there are extremely rare circumstances where it could be related to a hardware malfunction. This is significantly less common than software-related causes, and typically, hardware issues present with different symptoms. If you've exhausted all software troubleshooting steps and the red light persists under unusual conditions, it might be worth considering a hardware fault.
However, it's essential to distinguish between the on-screen red dot/light (privacy indicator) and a physical LED light on the device. Modern iPhones do not have physical red LEDs for status indicators like older phones might have had for battery or charging. Therefore, if you're seeing an on-screen red indicator, it's almost certainly software-driven. If you are referring to a physical light, it's crucial to confirm its exact location and color, as it might be an accessory or a very unusual device behavior.
Distinguishing On-Screen Indicators from Physical Lights
The primary 'little red light' discussed in this context is the on-screen privacy indicator that appears in the status bar when the microphone or camera is active. This is a software feature implemented by Apple. If you are observing a physical, blinking red LED on the iPhone itself, this is highly unusual and not a standard indicator. Such a physical light could potentially point to a rare internal hardware issue, a malfunctioning accessory, or perhaps a third-party case with its own indicator. It's crucial to verify that the light you are seeing is indeed part of the iPhone's standard interface.
If you're certain it's a physical light, try removing any cases or accessories that might be attached to your iPhone. Sometimes, external components can emit their own lights or interfere with device signals. If the light persists without any accessories attached, and it is a physical LED on the iPhone casing, this deviates from normal operation and could warrant professional inspection.
When to Seek Professional Support
If you've tried restarting your iPhone, force-quitting apps, updating iOS, and meticulously checking app permissions, yet the red light continues to appear erroneously or persistently without any discernible reason, it might be time to consider contacting Apple Support or visiting an authorized service provider. While hardware failures related to this specific indicator are rare, they cannot be entirely ruled out, especially if the light behaves in a manner inconsistent with standard iOS functionality.
Apple Support can perform remote diagnostics and guide you through more advanced troubleshooting steps. If they suspect a hardware issue, they will advise on repair or replacement options. Be prepared to describe exactly when and where the red light appears, and what troubleshooting steps you have already taken. This information will help them diagnose the problem more efficiently.
The Orange Dot: A Related Privacy Indicator
While the focus is on the red light, it's important to acknowledge its close companion: the orange dot. Both are privacy indicators introduced by Apple to inform users about microphone and camera usage. Understanding the distinction between the red and orange dots helps in a more comprehensive grasp of your iPhone's privacy status. They serve a similar purpose but relate to different components being accessed.
The orange dot, appearing in the status bar, specifically indicates that your iPhone's microphone is being used by an app. This could be during a phone call, a voice memo recording, a dictation session, or when using a voice assistant like Siri. If you see an orange dot and are not actively engaged in an activity that requires audio input, it prompts you to check which app is accessing the microphone, much like the red dot prompts investigation for camera or microphone use.
Understanding the Orange Dot's Meaning
The orange dot is a clear signal that your microphone is active. It's a privacy feature designed to ensure you are aware of any audio capture occurring on your device. When you initiate a voice call, use voice-to-text, or activate Siri, this dot will appear. Its presence is a confirmation that the microphone is operational and transmitting audio data. This is a standard and expected behavior during these activities.
Similar to the red dot, if the orange dot appears unexpectedly or persists when you are not using any audio-related functions, it suggests that an application might be accessing your microphone without your explicit consent or knowledge. This is where troubleshooting steps similar to those for the red light become relevant, such as checking Control Center and reviewing app permissions for microphone access.
Differentiating Red vs. Orange Indicators
The fundamental difference lies in the hardware component being accessed. The red dot signifies that the camera is in use, and potentially the microphone as well if the app is performing video recording or video calls. The orange dot, on the other hand, solely indicates that the microphone is active. Both are critical privacy alerts, ensuring you are never in the dark about what your iPhone is capturing.
When troubleshooting, remember that if you see the red dot, the camera is definitely active. If you see the orange dot, the microphone is active. If an app is using both (like a video call), you might see the red dot, as it's the more encompassing indicator of visual capture. However, some system behaviors might show both or prioritize one over the other. Always check Control Center for the most precise, real-time information about which app is using which component.
What the Red Light Does NOT Mean
It's important to demystify the little red light on your iPhone by clarifying what it does not signify. In the vast majority of cases, this indicator is a benign notification related to active hardware usage, not a harbinger of critical failure or a sign of a serious breach. Understanding these distinctions can prevent unnecessary alarm and help users focus on appropriate troubleshooting steps.
The red light is not an indicator of a compromised battery, a network connectivity issue, or an impending system crash. It is specifically tied to the activation of the camera and, often, the microphone. Therefore, if you're experiencing battery drain, slow internet, or app crashes, the red light is unlikely to be the direct cause or a symptom of these other problems. It operates independently as a privacy alert.
- It's not a battery or charging indicator.
- It doesn't signal network problems.
- It's not a general system error warning.
- It's rarely a sign of a major hardware fault.
Furthermore, it is not a general alert for all types of system errors. iOS employs different methods for notifying users about various issues, such as error messages, pop-ups, or system alerts. The red light is a specialized signal for hardware access, particularly sensitive components. Its presence is a specific piece of information, not a catch-all warning sign.
While hardware issues are extremely rare causes, the light is overwhelmingly a software-driven privacy feature. It's designed to be transparent, not alarming in the sense of imminent device failure. Therefore, when you see it, your focus should be on identifying the app or function using the camera or microphone, rather than assuming a critical hardware defect.
Not a Battery or Charging Status
Unlike some older electronic devices that might have used colored LEDs to indicate battery charge levels or charging status, the iPhone's red light indicator is not related to its power management. You won't see a red light blinking to tell you your battery is low, or a steady red light indicating it's charging. The iPhone uses distinct visual cues for battery status, such as the battery icon in the status bar, charging animations, and on-screen notifications when the battery is critically low.
The dedicated function of the red light as a privacy indicator means it's a separate system from battery notifications. If you are concerned about your iPhone's battery life or charging, you should look at the battery icon, check battery usage statistics in Settings, and ensure your charging cable and adapter are working correctly. The red light's purpose is exclusively tied to the active use of the camera or microphone.
Not a Sign of Network Issues
The red light on your iPhone is not an indicator of your Wi-Fi or cellular network connectivity status. Network problems are typically communicated through icons in the status bar (like Wi-Fi bars or cellular signal strength), on-screen error messages when attempting to access online content, or through general performance degradation of network-dependent features. The red light is an internal device status indicator related to hardware access, not external network performance.
If you're experiencing issues with internet speed, dropped calls, or inability to connect to Wi-Fi, you should troubleshoot your network by restarting your router, checking your cellular plan, or resetting network settings on your iPhone. The red light has no bearing on these connectivity issues and is focused on the activation of the camera and microphone.
Not a General System Error Alert
The red light is a specific alert for microphone or camera activity. It is not a general warning system for all types of software or system errors. When your iPhone encounters other types of errors, such as app crashes, storage issues, or operating system malfunctions, it will typically provide more direct feedback through on-screen pop-up messages, alerts, or the app itself behaving unexpectedly. The red light is too specific to serve as a catch-all error indicator.
If you receive an error message stating 'iPhone Storage Almost Full' or an app repeatedly crashes without the red light appearing, these are distinct issues requiring different troubleshooting approaches. The red light's presence is a targeted notification about privacy-sensitive hardware being accessed, and its absence does not guarantee that no other system issues are present.
Proactive Steps to Maintain Privacy and Control
Maintaining control over your iPhone's privacy and understanding its indicators like the little red light is an ongoing process. By adopting proactive habits, you can ensure that your device's sensitive hardware is only used when you intend it to be, and that you are always informed about its activity. This approach not only addresses potential concerns but also enhances your overall confidence in using your iPhone.
The foundation of proactive privacy management lies in understanding app permissions and regularly reviewing them. Don't grant access to your microphone or camera for apps unless it is absolutely necessary for their core functionality. Even then, consider if that access is needed all the time or only when the app is actively in use. iOS provides granular controls to manage this, empowering you to make informed decisions.
- Review app permissions regularly.
- Grant minimal necessary access.
- Keep iOS and apps updated.
- Be aware of Control Center and App Privacy Report.
Furthermore, staying informed about your iPhone's operating system updates is crucial. Apple frequently enhances privacy features and fixes potential vulnerabilities in its software. By keeping your iOS version current, you benefit from these improvements and reduce the likelihood of encountering software glitches that might trigger unexpected indicator lights.
Finally, familiarize yourself with the tools iOS provides for monitoring privacy. The Control Center and the App Privacy Report are your allies in understanding how your apps are using your device's hardware. Regular engagement with these features ensures you remain in command of your digital footprint.
Regularly Reviewing App Permissions
Make it a habit to periodically review the permissions you've granted to your applications. Go to Settings > Privacy & Security. Here, you can see which apps have requested access to your microphone, camera, location, contacts, and other sensitive data. For each app, consider if the permission is still necessary. For example, if you no longer use a specific app for photos, revoke its camera access. If an app that doesn't need audio functionality has microphone permission, turn it off.
This proactive auditing helps prevent apps from accessing your data or hardware unnecessarily, especially if they are running in the background. It’s a simple yet powerful way to safeguard your privacy and can directly prevent instances where the red or orange light might appear due to an app overstepping its intended use.
Utilizing Background App Refresh Wisely
Background App Refresh allows apps to update their content and data even when you're not actively using them. While convenient, it can also mean apps are running processes in the background that might require microphone or camera access, potentially triggering the privacy indicators. You can manage this feature by going to Settings > General > Background App Refresh. You can disable it entirely, or selectively turn it off for individual apps that you don't need to update constantly in the background.
By limiting which apps can refresh in the background, you reduce the chances of them accessing sensitive hardware without your immediate awareness. This is particularly useful for apps that have no legitimate reason to use your camera or microphone when not in active foreground use.
Understanding System Services Permissions
Beyond third-party apps, even Apple's own system services require certain permissions. Within the Privacy & Security settings, you'll find a section for 'System Services' (or similar, depending on iOS version). Here, you can control permissions for features like Location Services for system functions, device utilization tracking, and more. While most of these are essential for core iPhone functionality, it's worth understanding what each controls. Ensure only necessary system services have access to sensitive data.
For example, you might choose to disable location services for certain system functions if you don't actively use them, or if you want to further limit data collection. This granular control extends to all aspects of your iPhone's operation, helping to ensure privacy is maintained at every level.
iPhone Features That Use the Microphone and Camera
To better understand why the little red light might appear, it's helpful to know the common iPhone features and functions that utilize the microphone and camera. Recognizing these legitimate uses can help you distinguish between expected indicator behavior and potential anomalies. Apple has integrated these components deeply into the iOS experience, enabling a wide array of functionalities.
The camera, of course, is central to photography and videography. This includes the built-in Camera app, but also extends to any app that allows you to capture images or record videos, such as social media platforms, messaging apps, and video conferencing tools. Similarly, the microphone is essential for voice calls, voice memos, dictation, Siri, and any application that requires audio input.
Core Camera Functions
The most obvious use of the camera is through the native Camera app. When you open it to take photos or shoot videos, the red indicator will appear. This also applies to features like Portrait mode, slo-mo, time-lapse, and cinematic mode. Any application that requires you to capture visual content will activate the camera. This includes apps like Instagram, TikTok, Snapchat, WhatsApp, and FaceTime, where you use the camera for video calls or sharing visual media.
Even apps that don't primarily focus on media capture might use the camera for specific functions, such as scanning QR codes (which often uses the camera interface), augmented reality (AR) applications, or document scanning utilities. Always consider if the app you are using has a feature that inherently requires visual input.
Core Microphone Functions
The microphone is equally vital for communication and interaction. Making and receiving phone calls, recording voice memos, using dictation for text input, and speaking with Siri are primary uses. Voice-activated features in various apps, voice search functionalities, and recording audio for videos all rely on the microphone. Apps like voice note recorders, podcasting apps, and even some games that use voice chat will activate the microphone.
Furthermore, accessibility features such as Live Listen, which can help amplify sound through your AirPods or Beats headphones, also utilize the microphone. Background audio recording for apps like Voice Memos or if you've set up an 'Attention Awareness' feature that uses audio input can also trigger the orange or red indicator.
Third-Party App Integrations
Beyond Apple's native apps, a vast ecosystem of third-party applications leverages the iPhone's camera and microphone. Social media platforms, communication apps, productivity tools, and even some games will request access. For instance, a fitness app might use the camera for form correction, or a language learning app might use the microphone for pronunciation feedback. It's crucial to grant permissions judiciously, only to apps you trust and whose functionality genuinely requires these components.
Always be mindful of the permissions requested during app installation or first use. If an app asks for microphone or camera access and its purpose isn't immediately clear, take a moment to investigate its features or developer. This diligence is key to preventing unwanted access and ensuring the red light only appears when you expect it to.
FAQ: Your Questions About the iPhone's Red Light Answered
Here are answers to some of the most common questions users have about the little red light appearing on their iPhone. We aim to provide clear, concise information to help you understand and manage this indicator.
Troubleshooting Tips for Persistent Red Light Issues
If you've followed the standard troubleshooting steps and the little red light on your iPhone continues to be an issue, a more systematic approach might be needed. Persistent indicators, especially when not tied to active app usage, can be frustrating. This section delves into advanced steps and considerations for resolving stubborn red light problems.
The key is to be methodical. Start by ensuring no app is genuinely using the hardware, then move to system-level resets and checks. If the problem persists, it might indicate a deeper software conflict or, in rare cases, a hardware anomaly that requires professional attention.
Checking for Rogue Background Processes
While Control Center and the App Privacy Report are excellent for identifying active apps, sometimes background processes can be more elusive. If you suspect a process is running amok, performing a full shutdown and restart is the most effective way to clear all active processes. Ensure you wait at least 30 seconds after the screen goes black before pressing the side button to power it back on. This ensures all temporary system states are reset.
If the issue continues after a restart, consider if any recently installed apps or system updates might have introduced the problem. Sometimes, a conflict between apps or a bug in a new update can cause unexpected behavior. If the problem started immediately after a specific action, that action is your prime suspect.
Resetting Network Settings (Indirect Impact)
While not directly related to the red light, sometimes network-related glitches can indirectly affect app behavior and cause them to behave erratically, potentially leading to microphone or camera access issues. Resetting network settings can resolve underlying connectivity problems that might be contributing to app instability. To do this, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Note that this will erase all saved Wi-Fi passwords and cellular settings, so you'll need to re-enter them.
This is a more drastic step, so use it if other methods fail. It helps to rule out any network-related software corruption that might be impacting how apps interact with system resources, including the camera and microphone.
Factory Reset as a Last Resort
As a final software troubleshooting step, a full factory reset (erasing all content and settings) can resolve deeply ingrained software issues or corrupted system files that might be causing the persistent red light. **Crucially, back up your iPhone before performing a factory reset.** You can do this via iCloud or by connecting to a computer. Once backed up, go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings.
After the reset, you can choose to set up your iPhone as new or restore from your backup. If the red light issue is resolved when setting up as new, but returns after restoring from a backup, it indicates that the issue might be present within the data or settings within your backup. In this case, you would need to reconfigure your iPhone manually and re-download apps selectively to identify the problematic element.