Owners of modern smartphones are often looking for ways to make notifications more visible, especially in noisy places or for people with hearing impairments. Turning on the indicator light when there is an incoming call is a useful feature that allows you not to miss an important call, even if the phone is face down or in your bag. However, in the operating system Android 11 the location of the settings may differ from the usual menus in older firmware versions.
The process of activating this option depends not only on the version of the operating system, but also on the manufacturer of your device. Shells from Samsung, Xiaomi or Google have unique algorithms for controlling access and system parameters. In this article, we will analyze in detail all possible methods, from standard settings to using engineer codes, so that you can set up visual notifications on your device.
Standard settings of the Android 11 system
Let's start with the simplest and most reliable method, which is provided by Google developers for “pure” Android and many stock firmware. The light indicator function is usually hidden in the accessibility section, since it was originally created as an auxiliary tool. You need to open the main menu and find the item Settings, which usually looks like a gear.
Then the path may vary slightly, but the logic remains the same. Look for the section Special. capabilities or Special capabilities. Inside this menu we are interested in the subsection related to hearing or visual alerts. In some assemblies it is called Hearing, while in others it can be placed in a separate category Additional settings. This is where the switch responsible for the operation of the LED flash is hidden.
Pay attention to item Flash on notification. Activating this slider causes the camera to blink for any incoming events, including calls and messages. However, it is worth considering that in some custom shells this option may only work for application notifications, ignoring the phone book. In this case, you will need deeper settings through the “Phone” application.
If you do not find the “Special” item. capabilities" in the main menu, use the search bar at the top of the settings screen and enter the query "flash" or "blinking".
Settings through the "Phone" application
Often smartphone manufacturers bring call function control directly into the dialing interface. This makes it easier to access options without forcing the user to navigate deep system menus. Open the standard application Phonethat you use to make calls. In the upper right corner of the screen you will see an icon with three dots or a profile icon.
Clicking on this icon will open a drop-down menu where you should select the item Settings. The interface of this section may vary significantly depending on the brand. For example, on devices Samsung you need to look for the section Notifications or Ring and vibration style. There may be a separate toggle switch Flash camerasthat duplicates the system setting, but works with priority for voice calls.
If there is no explicit mention of flash in the phone settings menu, check the section Quick Reply or Gestures. Sometimes the light indication function is tied to certain actions during a call. It's also worth checking to see if you have Do Not Disturb turned on, which can block visual cues even if the main setting is active.
- 📱 Open the Phone app and tap the three dots in the corner of the screen.
- ⚙️ Go to the "Settings" section and find the "Notifications" or "Advanced" item.
- 💡 Turn on the "Flash on call" or "Camera flash" switch.
- 🔇 Make sure that the "Do not disturb" mode does not block visual notifications.
Features of the MIUI and One UI shells
Smartphone users Xiaomi and Samsung face unique interface features that can be confusing. In the shell MIUI (and its HyperOS variants), the flash setting is often placed in the additional settings section, but has its own specifics for working with the camera mode. Go to Settings, then select Advanced settings and find the item Special. opportunities.
Here you will find a tab Hearing. There is a switch inside it Flash for notifications. An important note for owners Xiaomi: this function may not work if the camera application is running in the background, since the system cannot simultaneously use the flash for a photo and for an alarm. In this case, you need to close the camera before waiting for a call.
Owners of devices Samsung with a shell One UI have more flexible settings. In addition to the standard path through accessibility, they can customize Modes script creation. Go to Settings → Modes and scenarios. Here you can create an automation: “If there is an incoming call, then turn on the flashlight.” This allows you to configure blinking even in cases where the standard function is buggy.
Why does the flash not fire on Xiaomi?
On some Xiaomi models with With the old type proximity sensor, the system blocks the flash if the phone is lying face down to avoid false alarms from the light sensor. Try turning the phone screen up to check.
Using third-party applications
If the system settings do not give the desired result or the interface of your smartphone is too stripped down, third-party solutions from the store come to the rescue. Google Play. There are many applications specifically designed to control light signals. They intercept the event of an incoming call and forcefully activate the LED, bypassing system restrictions.
One of the popular solutions is an application Flash Alert or its analogues. After installation, such a utility requests permission to access the phone and camera. It is important to provide all the requested rights, otherwise the app will not be able to work at the right time. In the application settings, you can select the blinking frequency, color (if you have a multi-color LED) and signal duration.
It is worth remembering that installing third-party software increases the load on RAM and battery. The application should constantly hang in the background, waiting for a call. This may cause the device to drain faster than the system's built-in feature. Use this method only if standard means cannot solve the problem.
| Application name | Access type | Impact on battery | Features |
|---|---|---|---|
| Flash Alert | Phone, Camera | Medium | Setting blinking patterns |
| Call Flashlight | Phone | Low | Works only on calls |
| LED Blinker | Notifications | High | Supports all types of notifications |
| Super Flashlight | Camera | Medium | Strobe mode |
Do Not Disturb mode and sound profiles
A common reason for the flash not working is the activated mode Do Not Disturb. In Android 11, this mode has become very smart and can block not only sound, but also visual effects, if specified in its rules. Check the settings for this mode by pressing and holding the moon icon in the notification shade, or through the settings menu.
Inside the Do Not Disturb mode settings, find the section Allow alerts or Exceptions. Make sure that permission is set for incoming calls, and the checkbox next to “Visual effects” or “Light indication” is also active. Sometimes the system turns off the lights by default when quiet mode is turned on, considering this to be an unnecessary distraction.
Also check the sound profile. If you have the profile set to Silent or Vibrate, the flash may not fire depending on the manufacturer's settings. Try switching to the “Sound” profile and checking the indicator. If the flash works when there is sound, but not when there is vibration, the problem is precisely in the logic of the silence profile on your device.
⚠️ Attention: In some versions of Android 11, the Do Not Disturb mode completely ignores the flash settings to save energy. If it is critical for you to see the call in silence, add the contacts of loved ones to the “Favorites” list and configure for them to bypass the silence mode.
☑️ Diagnosing a problem with the flash
Engineering menu and hidden codes
For advanced users who did not find the desired option in the normal interface, there is access to the engineering menu. This is a hidden section of the system intended for testing equipment. It is accessed by dialing a special code in the Phone application. The codes vary depending on the processor and manufacturer: for MediaTek this is often ##3646633##, and for Samsung — #0#.
When getting into the engineering menu, be extremely careful. Changing unknown parameters may result in incorrect operation of the radio module or camera. We are interested in the section related to Hardware Testing or LED. Here you can test the flash operation by pressing the test button. If the flash lights up during the test, but does not work during a call, then the problem is software, not hardware.
In some cases, through the engineering menu you can force the function to be enabled LED Notification. However, this method is not universal. On many modern smartphones with Android 11, access to these settings is locked with a password or completely removed from the firmware for the user’s safety. Use this method only if you understand what each parameter is responsible for.
Codes to enter the test menu (do not work on all devices):
#0# (Samsung)
##4636## (Universal Android)
##3646633## (MediaTek)
⚠️ Attention: Never change the values in fields whose names are unfamiliar to you, especially in the RF (Radio Frequency) and Band sections. This may lead to loss of network or blocking of the SIM card.
If the flash works in the engineering test, but not during a call, then the hardware is working properly, and the problem should be looked for in the application settings or sound profiles.
Possible problems and their solutions
Even after correct settings, users may encounter a situation where the flash stops working. One common reason is application conflict. If you have multiple flashlight or notification management apps installed, they may be blocking each other's access to the camera hardware. Try removing unnecessary utilities.
Another reason is outdated software. Early builds of Android 11 may have had bugs related to LED control. Check for system updates in the menu About the phone → Software update. Manufacturers often release patches that correct the operation of camera drivers and indicator lights.
It is also worth considering physical wear and tear. The flash LED has a limited resource, although it is very large. If the flash blinks dimly or with a delay, there may be a problem with the contacts or the camera module itself. In this case, the software settings will no longer help, and a visit to the service center will be required.
Why does the flash blink only once?
This is standard behavior to save battery power in notification mode. The system is configured to give a short signal but not drain the battery with a constant strobe light. You can change the frequency only in third-party applications.
Is it possible to configure different flash colors for different contacts?
This cannot be done using standard Android 11 tools, since the LED is usually one-color (white or yellow). To implement color indication, smartphones with a special RGB notification LED (which is not available in all models) and third-party software are required.
Does the turned on flash affect the quality of the photo during a call?
No, since these functions work at different times. However, if you are on a video call and the notification flash is turned on, it may briefly illuminate the frame when a second call comes in.
Are flash settings reset when you update Android?
In most cases, accessibility settings are retained. However, after a major firmware update, it is recommended to double-check all switches, as the system may reset them to default values to ensure stability.
Does the flash work if the phone is completely dead?
No. The LED requires battery power to operate. If the phone turns off due to low battery, the flash will not fire. Some models may blink once at a critical charge level, but this does not apply to the call function.