Why WiFi falls off on Xiaomi smartphone: a full analysis

The situation when WiFi falls off on a Xiaomi smartphone is familiar to many owners of devices of this popular brand. Users often face a sudden disappearance of the connection icon, inability to load a page or constant reconnections in the midst of an important conversation or watching videos.

The reasons for this behavior of the Android shell MIUI HyperOS can be very different, from banal interference in the air to software failures in the network module. IP-addresses, or energy saving settings that too aggressively “sedate” the communication module to save battery life.

In this article, we will go through all the possible failure scenarios and propose step-by-step solutions. 80 percent of the time, the problem is solved by change. MAC-You don't have to be an expert in programming to restore a stable connection, you just have to follow the instructions carefully.

Software failures and operation of network modules

One of the most common reasons why Xiaomi loses WiFi is because of temporary software errors in the operating system, which can conflict with new router or provider parameters, especially after updating the firmware or changing the password from the wireless network.

The system processes that are responsible for connection can freeze in the background. If you notice that the problem occurs after you leave the sleep mode of the screen, then the energy saving mechanism is not working correctly, in such cases, simple restarting of the device helps, which cleans the RAM and restarts all system services.

Also, it is worth considering that some pre-installed applications or “optimizers” can force the WiFi module to turn off, considering it to be a waste of resources.

⚠️ Warning: If the problem persists after the reboot, don't bring the phone to the service immediately. Often the solution lies in the router settings or a specific network profile.

Router problems and frequency ranges

Connection instability often lies not in the phone, but in the access point. If your router is running in the congested 2.4 GHz band, the signal can be constantly interrupted due to neighboring networks. Modern Xiaomi smartphones support the 802.11ac and 802.11ax standard, which allows you to work in a more free 5 GHz band.

Switching to 5GHz significantly reduces interference, but this range has its own peculiarities: 5GHz signal penetrates walls worse and has a shorter range compared to 2.4GHz. If you are far from the router, the phone can constantly lose communication, trying to hold a weak signal.

In addition, the router itself may not be able to cope with the number of connected devices. If you have multiple smart home gadgets, torrents, or download heavy files to your PC, the router buffer overflows, and it starts to “drop” the least priority connections, which often include smartphones.

If you want to diagnose a problem, try to approach the router, and if the signal is stable in the immediate vicinity and the other room is lost, it's the coating or the walls, and if you want to install a repeater or switch to a Mesh system, it's going to help.

Power saving settings MIUI and HyperOS

The MIUI shell and the new HyperOS are known for their aggressive battery optimization.The system seeks to maximize the life of the smartphone, so it can limit the background activity of network modules. This is why WiFi on Xiaomi is turned off when the screen goes out or the phone is in your pocket.

To fix this, you need to manually configure permissions for system services. Often users accidentally activate Flight or Energy Saving mode, which blocks constant network search, and it is also worth checking whether Turbo mode is enabled in game mode, which can turn off background downloads.

It is important to check the settings of a specific WiFi profile. Network settings may limit background data usage or automatically shut down when you lock your screen, which are designed to save traffic, but in practice create more problems than benefits.

Conflicts IP-addresses and DNS-server

A common technical cause of breakups is conflict. IP-addresses within the local network. DHCP If two devices receive the same address (for example, due to a failure in the rental table), one of them will be constantly thrown out of the network.

Problems can also arise due to incorrect work. DNS-If the server is not responding or responds slowly, the phone may think that the Internet connection is missing, even if there is a connection to the router. DNS, For example, from Google (8.8.8.8) or Cloudflare (1.1.1.1).

To solve the problem with IP-Addresses can be changed to change settings DHCP on the router, increasing the pool of addresses, or set a static IP-address directly in the WiFi settings on your smartphone, which will eliminate the possibility of conflict in the future.

⚠️ Note: When installing a static IP-Make sure you don’t use an address that is already occupied by another device on your network (such as a printer or TV).

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Use the WiFi Analyzer app for Android to see which WiFi channels are congested by neighbors and switch the router to a freer channel via the web interface.

Resetting network settings and software updates

If simple methods don't work, you'll have to resort to more radical measures: Network resets are a secure procedure that deletes all stored WiFi passwords, Bluetooth settings, and mobile access points, often eliminating deep-seated configuration software errors.

You can reset through the settings menu. The path may vary slightly depending on the shell version, but it's usually in Connection and Sharing or Advanced Settings. Once reset, the phone will reboot and you'll have to re-enter your network password.

And don't forget to upgrade. Xiaomi engineers regularly release security patches and stability improvements to the communication modules, and if you have an older firmware version installed, the problem may already be known and fixed in the update.

Settings -> About Phone -> MIUI version (click several times)

This command will check for updates. If the system offers to upgrade, be sure to do so by connecting to a stable network or using the mobile Internet.

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Network resets do not delete your personal files, contacts or apps, it only affects your connection settings.

Hardware malfunctions of the antenna module

In rare cases, the problem is physical: If the smartphone fell, was exposed to moisture or simply has a manufacturing defect, the antenna module could move away from the board, in which case the WiFi signal disappears completely or only appears when the phone is in a certain position in space.

You can diagnose a hardware problem by connecting to different networks, if the phone doesn't see any networks within a 5-meter radius, or if the WiFi icon is gray and inactive immediately after turning on, there's a high probability of failure, and this is also indicated by heating the bottom of the smartphone when you try to turn on WiFi.

The solution here can only be repair in an authorized service center. Independently disassemble modern monolithic Xiaomi smartphones without experience and tools is not recommended, as there is a high risk of damage to the plumes or battery.

⚠️ Note: If the phone is under warranty, any self-repair or opening of the case will result in the loss of warranty obligations.

Additional parameters of the developer

For advanced users, there is a Developer Menu where you can find hidden WiFi settings, where you can change the WiFi region (important to comply with frequency standards in different countries) or turn off network scanning in sleep mode.

One useful feature is to turn off the WiFi Assistant, which automatically switches the phone to the mobile Internet if the WiFi signal seems weak, and often it is not working properly and switches the network when it is not necessary, creating the illusion of a cliff.

You can also find WiFi Aggregation on the developer menu, which allows you to combine channels to increase speed, but on older routers, this can cause instability. Try experimenting with these settings if standard methods fail.