Budget smartphone owners often face the need to visually monitor incoming events, especially in noisy rooms. Xiaomi Redmi 9C, despite the affordable price, features a feature camera module that can be adapted to light indications. This feature is useful when the phone is lying down screen or in your pocket, and you do not hear the melody of the call.
Unlike flagship devices, where a special LED is responsible for blinking, it uses software emulation through the main camera. Activation of the mode requires understanding the operation of the MIUI shell, since standard Android settings can be hidden or renamed by the manufacturer. The correct configuration allows you to turn the device into a full-fledged tool for people with hearing impairments or simply for those who value convenience.
Keep in mind that a flash flash can affect battery life, but current MIUI algorithms are optimized to minimize power consumption at rare notifications. Below we will discuss in detail all available activation methods and possible nuances of the system.
Standard settings of the MIUI system
The first and most obvious way is to find the built-in option in the settings menu. Xiaomi developers often hide useful features in sections that are not obvious at first glance. First, you need to go to the main menu and select Settings. Next, the interface may differ slightly depending on the firmware version, but the logic remains the same.
You'll need to find the Additional Settings or Special Features section, and that's where accessibility options for disabled users are hidden. Look for a subsection called Hearing or Audio/Visual. Inside this menu, there's often a switch that blinks the camera when you call.
- 📱 Open the smartphone settings menu.
- 🔍 Go to the section "Additional settings».
- 👂 Select the “Special Opportunity” or “Hearing” tab».
- ⚡ Activate the switchboard "Flash at notifications».
If you don't have one on your menu, it doesn't mean that the feature isn't available. It's possible that your version of the MIUI shell has a slightly different menu structure, so you should search for the settings by typing in the word "flash" or "notification," and the system will tell you where the switch is.
Use of the Camera application
There's an alternative activation pathway that's directly linked to the camera software. Some versions of Redmi 9C firmware allow you to control flash behavior through the settings of the photo application itself. This seems counterintuitive, but technically, it's the camera module that is responsible for applying voltage to the LED.
Run the standard Camera app and go to the settings menu, usually indicated by three horizontal lines or a gear in the corner of the screen. Scroll down to the end. You may be interested in Flash Settings or LED flash for alerts. If such a item is active, it will allow you to use the flash to signal events.
⚠️ Note: On some global firmware versions, this item may be blocked or hidden by the manufacturer to save battery life.If you don't find this switch, move on to the next section with third-party solutions.
It is important to understand that settings in the Camera application can be overwritten by system priorities. If after turning on the option in the camera it does not work in locking mode, then system ban has a higher priority, in which case you need to look for workarounds or use specialized software.
Why did the flash setting disappear?
Third-party display annexes
When Xiaomi's built-in tools don't work, Google Play comes to the rescue. There are many apps designed specifically to manage notification flashes that run on top of the system and intercept incoming events, causing the LED to blink.
One of the most popular and reliable solutions is the Flash Alerts app, or its analogues, and once installed, you'll need to give the software the necessary permissions to access the camera and notifications, and without this critical step, the software won't be able to function properly.
- 📥 Download Flash Alerts from Play Market.
- ✅ Provide all the requested permissions.
- 🔔 In the application settings, select notification types (Calls, SMS, Messengers).
- 🎨 Adjust the frequency and duration of the blinking.
The advantage of third-party software is that you can set different blinking patterns for different contacts or applications, for example, for important calls, the flash can flash quickly, and for messages from social networks, it can be slow, and this allows you to visually distinguish the type of event without taking the phone out of your pocket.
Set up notifications for specific applications
The light display feature is most popular for instant messengers and social networks. Redmi 9C allows you to configure in detail which applications the flash will light up for, through the system notification menu or through the settings of the applications themselves.
Go to Settings → Notifications and Status bar. This shows a list of all installed programs. Choose the right messenger, such as WhatsApp or Telegram. Make sure that you allow notifications to be displayed on a locked screen. Often it is the lock screen that prevents the flash from working if the application does not have the appropriate priority.
Within the settings of a particular application, find the Sound and Vibration section. Some programs have their own built-in Light Indicator option. If there is one, it will work regardless of the MIUI system settings. However, system settings usually have a higher priority for managing the hardware.
| Annex | Location of settings | Features of work |
|---|---|---|
| Settings → Notifications → Light | Requires active screen or special permissions | |
| Telegram | Settings → Notifications → Blinking | Operating stably in the background |
| Incoming challenge | System settings → Special capabilities | Uses maximum flash brightness |
| SMS | Messages → Settings → Notifications | Depends on the MIUI shell version |
Remember that every activated notification source increases the load on the processor. If you set the blinking for dozens of applications, the phone can start to run faster in standby mode, and it is recommended to select only the most important sources of information.
☑️ Checking notification settings
Impact of the energy saving regime
One of the common reasons why the flash stops flashing is Xiaomi's aggressive energy saving policy: The system automatically shuts down power-intensive functions to extend the battery life of the device.The camera flash consumes a significant amount of power even at short-term pulses.
Check the status of the energy saving mode. If the "Energy Saving" or "Ultra-Energy Saving" mode is activated, the light display function will be forcibly turned off. Switch to "Performance" or "Balanced" mode to restore the LED to work.
Also, look at the battery settings. Find the app you want to receive notifications through (like a third-party flash app) and prevent the system from limiting its background activity. The path usually looks like this: Settings → Battery and performance → Battery consumption by apps.
⚠️ Warning: Prolonged use of the flash as an indicator can cause the camera module to heat up.While short-term pulses are safe, do not leave the phone in active display mode under direct sunlight or on soft surfaces that prevent heat transfer.
The current lithium-polymer batteries in the Redmi 9C have built-in protection controllers that prevent critical overheating by turning off the flash, but operating regularly at the temperature limit can accelerate battery degradation in the long run.
💡
To minimize charge consumption, set the flash pulse to a minimum of 0.5 to 1 second. One short blink is often enough to notice a notification in the dark.
Diagnostics and troubleshooting
If you’ve done all the settings, but the flash on the Xiaomi Redmi 9C never worked, there may be a deeper problem, and there may be software failures when the camera driver stops responding correctly to system commands, in which case a simple reboot of the device will help, which will clear the temporary cache and restart all system processes.
It’s also worth checking if the feature conflicts with other applications, for example, if you have a flashlight that runs in the background, it can block access to the LED for other programs, close any unnecessary applications from memory and try activating notifications again.
In rare cases, you need to reset to factory settings. A full Hard Reset will delete all your data, so be sure to back up your contacts and photos before doing this. This is an extreme measure to resort to if other methods have not worked and you are sure that (hardware) is working.
- 🔄 Perform a smartphone reboot.
- 🧹 Clear the Camera app cache and Settings.
- 🚫 Check the list of banned apps in the battery settings.
- 🛠 In extreme cases, perform reset to factory settings.
Don’t forget to keep an eye out for system updates. Xiaomi regularly releases security patches and improvements for MIUI. Perhaps the new firmware version has already solved the display problem, and you just need to update the software through the About Phone menu.
💡
If software methods do not help, the problem may be hardware damage to the camera plume or the LED itself, which requires a visit to the service center.