Notification Flash in Xiaomi Redmi 9: 4 Ways to Configure + Error Solutions

Xiaomi Redmi 9 is one of the most popular budget smartphones, but many users face the problem: how to make the flash flash flash flash when alerts flash? This feature is not only convenient in noisy places, but also helps not to miss important messages when the phone is lying down. Unfortunately, in standard MIUI settings, the option is often hidden or does not work properly.

In this article, you will find 4 proven ways to enable flash notifications, from official settings to hidden system features.We will also discuss why the feature may not work on Redmi 9 (including Redmi 9A/9C/9T models) and how to fix it. All instructions are relevant for MIUI 12, 13 and 14 firmware, including global and Chinese versions.

1.Official method: setup through “Special features”

The most reliable method is to use the built-in MIUI features for users with disabilities, in which case the flash will not only work on calls, but also on notifications from messengers (WhatsApp, Telegram) and social networks.

How to turn on:

  1. Open the Settings. → Special facilities.
  2. Select Rumors (or Notifications and Sounds in some versions of MIUI).
  3. Activate the Flash switch at notifications.
  4. In additional settings (cog next to the switch) select: 🔦 Flash color (white or color if supported). 🔄 Blinking frequency (recommended "Mediocre" to save battery life). 📱 Applications – tick the messengers for which you need a flash.

Important! Some Redmi 9 firmware may call this item "Camera Flash on Calls/Notifications." If you don't have an option, move on to the next one.

📊 You use flash on notifications?
Yeah, all the time.
Only important contacts
I tried it, but I turned it off.
No, you don't.
I didn't know about that function.

2. Hidden setting through the "Laboratory" MIUI» (advanced)

If the standard method didn’t work, try turning on the flash through the hidden developer menu.This method works on Redmi 9 with MIUI 12.5+ firmware, but requires caution.

Instructions:

  1. Activate Developer Mode: Go to Settings → About Phone. Click 7 times on the MIUI Version until the “You’re a Developer” notification appears.

Settings → Additional → For Developers

MIUI Laboratory

Hidden settings

Notification flash

Notification Light

On some versions MIUI This item is missing, which means that the manufacturer has disabled support at the firmware level, in which case only manual editing of system files (method) will help. №4).

Developer mode activated|Battery charge > 30%|Power-saving modes disabled|Backup of important data is made-->

3.Apps-analogues: alternative for all versions of MIUI

If the system settings do not allow you to turn on the flash, use third-party utilities. They work even on the Redmi 9A with a stripped-down firmware, but require additional permissions.

Top.-3 tested applications:

  • 📱 Flash Notifications (Play Market) – supports color and frequency blinking, works with most messengers.
  • 💡 Light Flow – Advanced settings for notifications, including LED It's a flash. ADB-permissions for full-time work.
  • ⚡ Flash Alerts 2 — Minimalist interface, low battery consumption.Supports Xiaomi Redmi 9/9T/9C rootless.

How to set up (for example, Flash Notifications):

  1. Install the app from Google Play.
  2. Launch and grant permissions to Notices and Camera.
  3. Select in the settings: 📌 Type of flash - "Camera" (not LED!). 🔕 Turn off the sound if you do not need an accompanying signal. 📵 Exceptions – Add apps that don’t need a flash.

Test by sending yourself a message from another messenger.

⚠️ Note: Flash applications can drain the battery faster (up to 5-10% per hour of active use.

4. Manual editing of system files (for experienced)

If none of these methods worked, the last option is to change the MIUI configuration files, which requires root rights or ADB, but gives you 100% results.

Step-by-step:

  1. Install. ADB-Drivers on PC and connect Redmi 9 to USB (Turn on the debugging. USB developer-setting).
  2. Open the command line and type: adb shell su setprop persist.sys.notification_light 1
  3. Reboot your phone. If the flash doesn't work, edit the file. /system/build.prop: ro.config.notification_light=1 (Add a line to the end of the file).

💡

Notification flash is a useful feature, but it increases battery consumption by 3 to 7 percent per day, and if you notice a quick discharge, check your energy saving settings or turn it off overnight.

FAQ: Frequent flash questions on Redmi 9

❓ The flash only works on calls, not messages?
This is a firmware restriction. Solutions: Use a third-party app (like Light Flow). Update MIUI to the latest version — new firmware has extended notification support. Check permissions for messengers in Settings → Notifications.
❓ Can you adjust the flash color?
On the Redmi. 9 The flash color is not customizable - it's always white.The color effects are only available on flagship models (Xiaomi). 11/12) s RGB-Alternatively, use apps that support LED-Notifications (if they are on your model).
❓ Why flash flash flashes even when the phone is in your pocket?
This is normal behavior — the proximity sensor does not turn off the flash. To save charge: Turn off the function in the settings. Use apps with the up-screen-only option (for example, Flash Alerts 2). Set up a flash schedule (for example, only during the day).
❓ Will flash notifications work in Do Not Disturb mode»?
No. In Do Not Disturb (DND) mode, all notifications, including flash, are blocked. To get around this: Add important contacts to Exceptions (in DND settings). Use a separate notification app (e.g. Light Manager).
❓ Can you make the flash work only for certain contacts?
Yes, but not through the standard MIUI settings. Options: Flash Notifications has a Whitelist feature - add the numbers you want to add to it. In Truecaller or Google Contacts, assign a unique signal to important contacts, and then set up a flash just for it. Limitation: On Redmi 9 without root, this does not work with all messengers (for example, WhatsApp may not work).