Xiaomi and Redmi smartphone owners often face the mysterious behavior of their devices, when running applications suddenly stop responding or stop playing audio after locking the screen. This phenomenon is directly related to how the MIUI or HyperOS operating system manages background processes. Understanding what the background mode is is key to solving problems with autonomy and performance.
In fact, the background mode is a state in which the application does not appear on the screen, but continues to perform certain tasks using the resources of the processor and RAM. Unlike desktop operating systems, mobile Android has its own resource allocation features, which Chinese developers from Xiaomi have adapted to their needs of aggressive optimization.
In this article, we will take a closer look at how applications work in the background, explain why the system is forced to close them, and teach you how to adjust exceptions correctly. Proper management of these parameters will allow you to extend battery life without compromising important notifications.
The essence of background processes in the shell of MIUI and HyperOS
When you fold an app, it doesn't always disappear completely. There's an application lifecycle concept in the Android operating system where the background allows the program to stay active, waiting for user action or external events. On Xiaomi smartphones, a special system service that is often called a "process killer" monitors this.
The main purpose of background processes is to maintain functionality without constant user interaction, for example, the messenger must receive messages, the navigator must recalculate the route, and the music player must continue playing. However, the device’s RAM is not unlimited, and the system has to balance multitasking and energy savings.
MIUI shells and the new HyperOS are known for their aggressive approach to background tasks. Engineers believe it is better to close an extra application than let it drain the battery, which leads to a situation where the user does not receive a notification about a call to Viber or Telegram if he did not open the application in advance.
⚠️ Attention: Aggressive restriction of background processes may cause the alarm clock to fail at the designated time if the watch application has been offloaded from memory by the system.
Understanding this logic is essential to properly set up your new smartphone first, and you have to tell the system which apps are important to you and which ones can be ruthlessly destroyed to save power.
Why Xiaomi is Closing Apps for Compulsory Use
Many users mistakenly believe that the background mode works the same as on “pure” Android. However, Xiaomi firmware has a powerful optimization mechanism built in that analyzes user behavior and the frequency of use of applications. If the program has not been in focus for a long time, the system marks it as a candidate for closure.
The main reason for this behavior is the desire for maximum autonomy: the Chinese smartphone market is oversaturated with competition, and battery life is one of the key marketing indicators, so MIUI algorithms prioritize energy conservation over background activity of third-party services.
There is also the concept of "freezing" applications, which, unlike a full shutdown, a frozen application stores its memory but does not receive CPU time, which allows you to deploy the window faster when you re-start, but can block the execution of network requests.
Technical details of MIUI Optimization
It should be noted that the degree of aggression depends on the device model. On flagships with a large volume of RAM, the system behaves softer, whereas on budget models of the Redmi series, memory cleaning is much more frequent and tougher.
Set up autostart and background activity
For important applications to work correctly, you need to manually configure permissions. Standard Android settings are often not enough, so Xiaomi provides an advanced toolkit. The first step is to set up autorun, which allows the application to start with the system or after it is restarted.
The second critical parameter is the permission to operate in the background. Without that permission, the app will fall asleep as soon as you turn off the screen. The third level of control is the absence of battery constraints, which prevents the system from killing the process even when resources are scarce.
☑️ Set up an important application
The adjustment process may seem like a little bit, but it guarantees a stable operation, and let's look at a table that can help you understand the levels of constraints:
| Level of adjustment | Wherever | The effect |
|---|---|---|
| Auto-start | Security → Permits → Auto Startup | The app starts after turning on the phone |
| Background mode | Settings → Applications → [Name] → Battery | Allows work without an open window |
| Battery limitation | Settings → Applications → [Name] → Battery | Selecting a "No Limits" mode prevents euthanization |
| Retention in memory | Menu of running applications (swipe down) | The lock on the icon protects against manual cleaning |
Once you do this, the system will treat the application with great respect, but it is worth remembering that putting too many programs in “no limits” mode can negatively affect the device’s running time.
Memory management and process cleaning
Redmi owners are used to using the memory clean button in the menu of running apps, and many people do it reflexively, believing that freeing up RAM speeds up the smartphone, but in fact, in modern versions of Android, this is not always the case.
When you force an application to close, the system will then re-run its core services to keep the data up to date, and this startup-stop-run cycle consumes more power than if the application had simply been frozen in memory.
However, there are situations where cleaning is necessary, such as if an application is getting stuck, consumes abnormally much resources, or behaves incorrectly, in which cases manually resetting the process through the task manager is a useful action.
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Use the “Lock” function for applications that should always remain in memory, even after pressing the garbage cleanup button.
Also worth mentioning is the memory extension feature: Many Xiaomi models offer the option of using part of the internal memory as virtual RAM, which helps keep more applications in the background without closing them, although the virtual memory speed is lower than the physical one.
The impact of background tasks on battery and performance
The balance between functionality and energy consumption is a perennial topic of discussion, and background processes can be both beneficial and harmful, and useful processes synchronize email, update social media feeds, and verify location for maps.
Harmful or “parasitic” processes can occur due to errors in application code or unfair advertising, and can constantly wake the processor, turn on the GPS module or network adapter, which leads to rapid discharge and heating of the housing.
To diagnose problematic applications, use embedded statistics. Go to Settings → Battery → Statistics. Here you will see a list of applications, sorted by energy consumption. If the program you did not use is at the top of the list, its background activity should be limited.
⚠️ Warning: If you notice that your phone is warming up in your pocket, check the background processes. Often the culprit is a navigator or delivery app that keeps tracking your location.
Optimizing background activity not only saves charge, but also frees up computing power for games and heavy tasks. A smartphone that is not occupied with background nonsense runs smoother and more responsive.
Solving Notification and Synchronization Problems
The most common complaint Xiaomi users have is the lack of notifications, which is a direct consequence of the background restrictions, so if the system killed the messenger process, the server will not be able to send a push notification to the device until you open the application again.
To solve this problem, it is not enough to simply turn on the Internet. You need to make sure that for a particular application all the conditions are met: auto-start is allowed, battery restrictions are removed and the background is turned on. Also check whether the phone is in Do Not Disturb or Sleep mode.
In some cases, resetting Google services or reinstalling a problematic app helps, and it’s important to understand that some Chinese versions of apps may behave differently than their global counterparts due to the use of different push notification systems.
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The absence of notifications in 90% of cases is solved by setting the “No restrictions” mode in the Battery section for a particular application.
If the problem persists, try uninstalling the application and reinstalling it immediately by setting the correct permissions when you first start.The system often asks about the desired mode of operation on the first installation, and it is important not to miss this point.