Flash flashing when incoming on Xiaomi Redmi 9 is a useful feature for those who often miss a call in noisy environments. However, bright flashes can be annoying, especially at night or in dark rooms. Fortunately, the manufacturer has provided several ways to disable this option, both through standard MIUI settings and using hidden system settings.
In this article, you will find 3 proven methods of deactivating light indications, including instructions for different versions of the firmware. We will also discuss why the flash can continue to flash even after switching off in the settings, and what to do if the desired menu item is missing. All solutions tested on Redmi 9 with MIUI 12/13/14 and are relevant for 2026.
Why flash flash flashes when calling and whether it is possible to turn it off
Flash alerts have been added to Xiaomi for users with hearing impairments or those who are often in loud places. By default, it is activated on most models, including Redmi 9, Redmi Note 9 and other devices based on MIUI. Flash works not only when calling, but also when SMS, notifications from messengers (if configured in special features settings).
You can turn off the blink completely or selectively, for example, leave it for calls only, but remove it for messages.
- 🔄 On some firmware, the settings point is hidden and requires activation through the engineering menu.
- 📱 After updating MIUI Settings may be reset – check them after installing new versions.
- 💡 The flash will not flash if the phone is lying down screen (approximation sensor is working).
If you’re using Redmi 9 with custom firmware (like LineageOS or Pixel Experience), the path to settings may be different, requiring you to edit system files or install third-party apps like Flash Alerts 2.
Method 1: Disconnection through special features settings
The easiest method is to use the built-in MIUI settings. It works on most firmware versions, including MIUI 12.5, 13 and 14.
- Open the Settings app** (cog icon).
- Go to the Special Features section (may be called Universal Access on new versions).
- Select the item Rumor → Flash notification.
- Move the slider to the “Off” position or uncheck the notification types (calls, messages).
- Confirm the changes by clicking Ready or Save.
If Flash Notification is not in the Rumor menu, try an alternative path:
- Go to Settings → Notifications and Status bar.
- Select Additional or Notification Settings.
- Find the Flash option at notifications and turn it off.
Make sure your phone is over 30 times charged%|
Close all background applications |
Check the MIUI version in the About Phone section |
Make a backup copy of the settings (optional)-->
Important! Some versions of MIUI for Redmi 9 may call it something else, like Light Indication or Blinking LED. If you don't find a point, move on to the next way.
Method 2: Use the Engineering Menu (for hidden settings)
If the standard method didn't work, it's probably hidden in the Engineering Mode, which requires caution, because the wrong changes can disrupt the phone.
- Open the Phone app** and enter the combination: ##3646633###
Critical: Do not change other options on the engineering menu unless you are sure of their purpose.This can cause camera, network or sound to crash.
| Parameter in the engineering menu | Value for disconnection | Note |
|---|---|---|
| Call Flash Enable | 0 or Disable | Turns off the flash when you call. |
| Notification Flash Enable | 0 or Disable | Disables flash for notifications |
| LED Mode | Off | Completely deactivates the LED |
If the flash flash flash still flashes after changes to the engineering menu, try resetting the network settings:
- Go to Settings. → SIM-maps and mobile networks.
- Select Network Settings Reset (does not delete personal data).
What to do if the engineering menu is not opened?
Method 3: Disconnection through ADB-Teams (for experienced users)
If the first two methods didn't work, you can use ADB (Android Debug Bridge), which is suitable for users familiar with the command line.
- 🖥️ A computer with installed Xiaomi drivers and ADB.
- 📱 Included debugging by USB phone-on.
- 🔌 USB-cable (preferably original).
Instructions:
- Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
- Return to Settings → Additional → For developers and enable USB debugging.
- Connect your phone to your PC and execute in the command line:
adb shell settings put system notification_light_pulse 0
adb shell settings put system flash_notification_enabled 0To check the current values, use:
adb shell settings get system notification_light_pulse
adb shell settings get system flash_notification_enabledIf the commands don’t work, try an alternative:
adb shell settings put secure flash_on_call 0💡
Before using ADB, back up your data via Mi Cloud or locally. In rare cases, changes to your system settings can cause crashes.
Frequent problems and solutions
Even after the switch is off, the flash can continue to blink, and let's look at the typical causes and ways to address them:
⚠️ Note: If you use third-party notification management apps (such as Light Manager or Flash Alerts), they may override system settings. uninstall or disable them before setting up.
| Problem. | Possible cause | Decision |
|---|---|---|
| The flash flash flashes only when calling, but not when texting. | Separate settings for different types of notifications | Check settings in Special Opportunities → Hearing → Flash notification for each type |
| After the MIUI update, the flash started again. | Resetting settings to factory | Repeat the shutdown via the settings or engineering menu |
| There is no flash notification item on the menu | Firmware restriction or regional settings | Use the Engineering Menu or ADB |
| The flash flash flashes even when the phone is turned off | Hardware malfunction or firmware failure | Reset your phone to factory settings or contact the service |
If none of the methods worked, check:
- 📌 Are there energy saving profiles that can ignore user settings.
- 📌 Is the Do Not Disturb mode activated** with exceptions for calls (sometimes this affects the flash).
- 📌 Is the firmware damaged (try to reinstall) MIUI via Mi Flash Tool).
Alternative solutions: third-party applications
If the system methods didn't work, you can use Google Play apps that allow you to flexibly configure light notifications, including turning off the flash when you call.
- 🔦 Flash Alerts 2 — Supports selective shutdown for calls/SMS, color-frequency.
- 🔦 Light Manager – Advanced LED and flash management, including work schedule.
- 🔦 Flash Notification – a simple interface that can completely disable the function.
When using third-party applications, consider:
- 🔋 They may be using up extra battery due to background work.
- 🛡️ Some applications require permissions such as “Overlaying on Other Windows” and “Special Features”, which can affect security.
Important: Check the reviews and ratings of the app before installing. Some utilities contain ads or collect user data.
💡
Third-party apps are a temporary solution. Once the phone is reset or the firmware update, their settings can reset, and the flash will start flashing again.
Security and recommendations
Turning off the flash when calling is a safe procedure, but when working with an engineering menu or ADB, you should be careful.
⚠️ Note: Do not change the settings in the engineering menu unless you understand their purpose, for example, incorrect settings of Audio or Network can lead to loss of sound or mobile communication.
Tips for safe settings:
- 📱 Before the changes, ADB or engineering menu make a backup of important data.
- 🔄 If after the changes the phone started to work unstable, reset settings (Settings) → Additionally. → Resetting settings).
- 🔒 Do not install firmware or modifications from unknown sources – this can disrupt the flash and other components.
If you are not sure about your actions, it is better to contact the Xiaomi service center or use official support through the application “Feedback”** (Mi Community).
Remember, newer versions of MIUI (e.g. MIUI 14 and above) may change the location of menu items. If the instruction is not suitable for your firmware, check the current guides on the 4PDA or XDA Developers forums.