Have you noticed that messages on Telegram or WhatsApp appear on your Xiaomi with a delay of 5-30 minutes, or even hours? Or push notifications from banking applications come only after unlocking the screen? This problem is familiar to many owners of smartphones on MIUI, the branded shell of Xiaomi. Unlike “naked” Android, where notifications are delivered almost instantly, MIUI aggressively optimizes the background activity of applications, which often leads to delays of up to 2-3 hours even with a stable Internet.
In this article, we will discuss 10 Key reasons why Xiaomi notifications arrive late – from basic power saving settings to hidden options MIUI, You will learn how to check whether the delays are the smartphone itself or the problem on the server side of the application, and also get step-by-step instructions for setting up AutoRun, Without restrictions and other critical parameters. Separately consider the nuances for the models of Redmi, POCO and flagship lines Xiaomi 13/14.
1. Battery optimization in MIUI: the main culprit behind delays
MIUI is known for its aggressive energy saving policy, which blocks background activity in most applications to extend battery life, meaning that even if you have mobile internet or Wi-Fi enabled, Xiaomi can pause notification syncing until you unlock the screen or open the app.
To check if battery optimization is affecting delays, follow the following steps:
- 🔋 Go to Settings. → Annexes → Application management.
- 📱 Select a problem app (such as Telegram or Viber).
- 🔄 Press Battery Limits and select Without Limits.
- ⚡ Turn on the Auto Start switch (if available).
It is important to understand that even after these changes, some notifications may be delayed due to deep MIUI optimization. For example, on the Redmi Note 12 and POCO X5 models, users complain of delays even after disabling all restrictions, in which cases deeper adjustments are required.
⚠️ Warning: Turning off battery restrictions for all applications in a row can significantly reduce battery life.
2.Problems with Google Play Services and FCM
Most Android notifications are delivered via Firebase Cloud Messaging (FCM), Google’s push-message service, and if your Xiaomi has Google Play Services disabled or not working correctly, the notifications will be delayed or gone altogether.
How to check the work of FCM:
- Open Settings → Applications → Application Management.
- Search Google Play Services and check if AutoRun is enabled.
- Make sure the application is installed with no restrictions in battery settings.
- Update Google Play Services to the latest version through the Play Market.
On some MIUI firmware (especially on POCO F4 and Xiaomi 12T), users encounter a bug when Google Play Services spontaneously turns off background activity, in which case only a complete reset or flashing will help.
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If notifications are delayed after the Google Play Services update, try clearing the app's cache in Settings → Apps → Google Play Services → Storage → Clear the cache.
MIUI Security Settings: Hidden Limitations
MIUI has a separate Security app (or MIUI Security on global firmware) that manages background activity regardless of the basic settings. Even if you have disabled battery restrictions in Android settings, MIUI Security can block notifications.
How to set up MIUI Security:
- 🛡️ Open the Security app (shield icon).
- 🔍 Go to Autostart Management.
- 📲 Enable auto-run for all messengers and critical applications.
- 🔄 In Battery Optimization, add apps to the exclusion list.
On Redmi 10 and older, MIUI Security has a new Deep Optimization section that blocks background activity by default for all applications except system ones. To get notifications on time, this option must be manually disabled for each messenger.
| Xiaomi model | Typical delay in notifications | The main reason | Decision |
|---|---|---|---|
| Redmi Note 11/12 | 10–60 minutes | Optimizing the battery with MIUI Security | Disable "Deep Optimization" |
| POCO X3/X4 | 1-3 hours | Conflict with Google Play Services | Clear the FCM cache and update |
| Xiaomi 13/14 | 5-15 minutes | Limitations of background activity | Add batteries to exceptions |
| Redmi 9/9A | Post-sleep delays | Problems with the Doze regime | Disable optimization for messengers |
4. Doze Mode and Apps Sleep
Android has a built-in Doze Mode mechanism that limits background activity when the device is in standby mode. In MIUI, this mechanism works even more aggressively, especially on budget models (Redmi 8A, POCO M3). If your smartphone lies motionless for more than 30 minutes, the system can completely suspend the synchronization of notifications until the next wake up.
How to disable Doze for critical applications:
- Install the Don't Kill My App! app from the Play Market.
- Follow the instructions for your Xiaomi model (the app will tell you the exact paths in the settings).
- Manually add messengers to the list of exceptions to the Doze mode via adb (PC required):
adb shell dumpsys deviceidle whitelist +com.whatsappOn some MIUI firmware (e.g., Xiaomi.eu), Doze mode can be turned off completely through the developer’s hidden settings.
- Activate Developer Mode (7 times click on the MIUI version in your phone settings).
- Go to Settings → Additional → For developers.
- Find the MIUI Optimization option and turn it off.
⚠️ Warning: Disabling Doze Mode completely can increase battery consumption by 15-20%. Use this method only if other methods have not helped.
5. Problems with mobile Internet and Wi-Fi
If notifications are delayed only when using mobile Internet (and Wi-Fi is normal), the problem may lie in APN settings or operator restrictions. Some Russian operators (for example, Tele2 or Iota) by default block background traffic to save network resources.
How to check the APN settings:
- 📶 Go to Settings. → SIM-maps and mobile networks → Access points (APN).
- 🔍 Select an active profile APN and check the parameters:
- 📝 Make sure the Tip field is in. APN Default,supl,mms (for some operators, you need to add.fota for notifications).
- 🔄 Save the changes and restart the phone.
If the problem persists, try:
- 📱 Turn on flight mode for 30 seconds, then turn off.
- 🔄 Switch from 4G on 3G (Sometimes notifications work better on the old network).
- 📡 Check if the operator is blocking push traffic (call support asking for "allow background traffic to be used for the purpose of the operation) FCM").
Check the settings APN|Switch between 4G/3G|Insert "Flight mode" on 30 seconds|Update the operator profile|Calling for support to unlock FCM-->
6. Conflicts with third-party optimizers
Many Xiaomi users install additional memory cleanup or battery-saving apps (such as DU Battery Saver, Clean Master or Greenify) that often conflict with MIUI system mechanisms and can completely block notifications for "optimized" applications.
How to check the impact of third-party optimizers:
- 🧹 Remove all apps to clean up cache and save battery.
- 🔄 Reboot your phone and check notifications within 2-3 hours.
- 📊 If the delays have disappeared, the optimizer was the culprit. Restore it from backup and configure exceptions for instant messengers.
Especially often, problems arise with Greenify, a popular tool for freezing background applications. If you use it, make sure that messengers are added to the exception list.
List of dangerous optimizers for Xiaomi
7. Problems with firmware and regional versions of MIUI
Notification delays may be due to your Xiaomi’s regional firmware, for example, global versions of MIUI (e.g. MIUI Global) often have more stringent background activity restrictions than Chinese (MIUI China) or custom firmware (Xiaomi.eu).
How to check the firmware version:
- Go to Settings → About Phone → MIUI version.
- If there is RU at the end of the firmware name (e.g. V14.0.4.0.TMCRUXM), you have a global version for Russia.
- For Chinese firmware will be CN, for European – EU.
If you have global firmware and notifications are constantly delayed, you can try:
- 📲 Go to Xiaomi.eu (unofficial firmware with less restrictions).
- 🔄 Upgrade to the latest stable version MIUI through settings → Updating the system.
- 📡 Install the Disable Flag Secure patch (requires an unlocked bootloader).
⚠️ Note: Reflashing to the custom version MIUI (For example, Xiaomi.eu will cancel the warranty and may result in data loss. → Additionally. → Backup and reset.
8. Hardware limitations of budget models
On Xiaomi’s budget smartphones (e.g. Redmi 9A, POCO C31), notification delays can be due to hardware limitations, and these models feature weak processors (Helio G25, Snapdragon 439) that are physically unable to handle background tasks as quickly as flagship chips.
What can be done:
- 🔧 Turn off animations and visuals in Settings → Special facilities → Remove animations.
- 📱 Reduce the number of background applications (in Settings) → Annexes → Cleaning set up automatic cleaning).
- 🔄 Use lightweight versions of messengers (for example, Telegram X or Messenger Lite).
On some models (e.g. Redmi 8) it helps to disable MIUI Optimization via adb:
adb shell settings put global miui_optimization_disabled 1💡
On budget Xiaomi (Redmi 9/8/7 series), notification delays are often associated with weak hardware.