Flash when calling Xiaomi 9C: how to turn on and configure

Owners of Xiaomi Redmi 9C often face a situation where it is difficult to notice an incoming call in a noisy environment or when the table is vibrating, the solution is activating the light indication - a bright flash of the camera will flash on every call, attracting attention, a feature that is especially useful for people with hearing impairments or in high noise conditions.

Unlike Xiaomi’s flagship models, where the option is available out of the box, the budget Redmi 9C has to manually enable it through hidden MIUI settings. In this article, we will analyze all the activation methods, including alternative methods for users with custom firmware, as well as consider typical errors and their elimination.

Why is Xiaomi 9C not running flash when calling?

Before setting up, it is important to understand the reasons why the feature may be disabled or unavailable:

• 🔹 Lack of option in MIUI: In some regional versions of firmware (for example, for India or China), the manufacturer removes this feature from the menu.
• 🔹 Energy saving: Aggressive battery settings can block LED operation during calls.
• 🔹 Hardware restrictions: On separate Redmi batches 9C flash is not physically connected to the notification module (rarely, but occurs).
• 🔹 Application Conflict: Third-party launchers or optimizers (such as Greenify) can intercept LED control.

If your smartphone came under the first item, do not despair - below we will look at the workarounds through the ADB And third-party utilities. For the rest of the cases, standard settings are enough. MIUI.

Method 1: Standard activation via MIUI settings

On most Xiaomi Redmi 9C devices with original firmware, the option is hidden in the special features menu.

1. Open the Settings app (cog icon).
2. Go to the Special Opportunities section → Rumor.
3. Find the flash item at notifications (may be called Light Indication).
4. Activate the switch and select Calls in the event list.
5. Adjust the intensity of the blinking (options are available: slow, normal, fast).

If Flash notifications are not on the menu, then your version of MIUI does not support the function at the interface level.

Make sure the flash is photo | Turn off the power saving mode |Update MIUI to the latest version |Check if camera access is blocked for system applications-->

Method 2: Enable via hidden settings (Engineer Mode)

For advanced users, there is an engineering menu activation method that works even on firmware, where the option is removed from the standard interface, but requires caution - wrong actions can disrupt the camera.

Instructions:

1. Open the Phone app and enter the combination: ##3646633##.
2. In the engineering menu, go to Hardware Testing → Audio → LoudSpeaker Mode.
3. Find Flashlight Notification and set the Enabled value.
4. Save the settings and restart the device.

If the flash didn’t work after the reboot, check the permissions for the Phone Services app in the security settings (Settings → Apps → Permissions Management → Camera).

Method 3: Use ADB-Teams (for experienced users)

If previous methods failed, you can force the feature to turn on via Android Debug Bridge, which requires a computer and basic knowledge of working with ADB.

Step-by-step:

1. Turn on USB Debugging on your smartphone (Settings → About Phone → MIUI Version → 7 times click on the version bar → Back to Additional → For developers → activate debugging).
2. Connect Redmi 9C to your PC and open the command line in the folder with ADB.
3. Enter the command to check the connection: adb devices should display the serial number of the device.
4. Give permission to change system settings: adb shell settings put system notification_light_pulse 1
5. Reboot the phone.

After these steps are completed, the flash should flash when incoming calls are made, and if not, check if the settings have reset after the reboot (sometimes MIUI blocks changes via ADB).

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Before working with ADB, back up your data via Mi Cloud or Google Drive, which will prevent you from losing information if you crash.

Alternative solutions: third-party applications

If none of the system methods worked, you can use the apps from Google Play, which mimic the flash when calling, but have limitations:

• 📱 Flash Alerts 2: Supports color and blinking adjustment, but requires constant background work (consumes battery life).
• 📱 Flash Notification: Lightweight utility with minimalist interface, but may conflict with MIUI-optimization.
• 📱 Light Flow: Advanced settings for LED, but paid version is needed for full functionality.

Check reviews before installing, some apps don’t work properly on Redmi 9C due to firmware features, and note permissions: the app must request access to Notices and Camera.

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Third-party flash apps can reduce battery life by 10 to 15 percent, and use them only when needed.

Table: Comparison of flash inclusion methods on Xiaomi 9C

Typical problems and their solutions

Even after a successful setup, Xiaomi 9C users may experience problems.

⚠️ Warning: If the flash flash flashes chaotically or is out of sync with the call, check for updates MIUI. In versions below 12.0.5, a bug encountered a conflict of the camera module and notifications.

• 🔋 Flash does not work in power saving mode: Add the Phone app to the exception list (Settings) → Battery → Optimizing the battery).
• 📵 Blinks only when the screen is unlocked: Turn off the Uplift function to wake up in the screen settings.
• 🔄 After updating MIUI Stopped working: Reset the Special Opportunities settings to factory settings (Settings) → Special opportunities → Reset).

If the problem persists, try resetting the network settings (Settings) → SIM-maps and mobile networks → Resetting network settings: 10% of the time the conflict is caused by errors in the communication module.

FAQ: Frequent questions about setting up a flash