When a Xiaomi smartphone stops working wirelessly, it often takes the user by surprise: You try to turn on the module, but the slider in the menu just returns to its original position or burns in gray. This can happen after another system update, installing a new application or even for no apparent reason.
The problem of communication failure can be caused by software failure in the MIUI shell, and physical damage to the antenna module. Before you carry the device to the service, it is worth trying a number of actions that in 80% of cases help restore functionality. In this article, we will analyze all possible causes and provide a step-by-step algorithm of actions.
It is important to understand that ignoring the problem can lead to a complete failure of the module if the reason lies in overheating or short circuit. So if you notice that the phone has become very warm in the area of the camera, you should immediately stop trying to turn on and analyze the condition of the device.
Software failures and temporary system errors
The most common reason Wi-Fi is not turned on is accumulated system errors. MIUI-based Android operating system is complex and background processes sometimes conflict with each other. Simply restarting a device often solves the problem, as it clears RAM and resets the suspended services.
However, if a normal reboot doesn’t work, it’s worth doing a deeper procedure: Sometimes the system blocks the communication module because of a driver error that can’t be properly initialized when booting, and in such cases, resetting network settings helps, which doesn’t affect your personal files, but deletes saved passwords.
☑️ Diagnostics of software failure
Notice how the phone behaves in Safe Mode, and if this mode is Wi-Fi on and running consistently, then the problem is caused by a third-party app that you recently installed. VPN-A client, antivirus or battery optimization software.
⚠️ Note: Before performing a network reset, make sure you remember passwords from your Wi-Fi networks as they will be deleted from your phone’s memory.
Settings conflicts and energy saving parameters
The aggressive energy saving policies of Xiaomi smartphones often cause unstable communication modules, the system can force Wi-Fi to be turned off to save charge, blocking the possibility of its re-energization by the user, this is especially true for older models or devices with a worn-out battery.
It’s also worth checking if Do Not Disturb mode or special profiles that restrict background data transfer are activated, sometimes users accidentally activate features that block network connections at certain times of the day.
To check these parameters, you need to go to the battery settings and find the Settings or System application, and you need to allow background activity and auto-start so that the system does not stifle the processes responsible for communication.
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Turn off the Wi-Fi Assistant feature in advanced Wi-Fi settings if it's enabled. It may try to switch you to mobile internet, creating the illusion of a module malfunction.
Another important aspect is the date and time: if the phone has a lost date (for example, it is 2020), the security certificates will not work, and the module may behave incorrectly, refusing to connect to the router.
Problems after firmware update
Often, users experience Wi-Fi disappearing immediately after a MIUI update.This is because new configuration files may conflict with the old settings left in the /data partition.The system tries to apply new rules, but old cached data interferes with this process.
In such cases, it is recommended to clear the cache of the Wipe Cache Partition through the Recovery menu.This is a secure procedure that does not delete your photos or contacts, but cleans temporary system files that may have been corrupted during the update.
How to Sign In to Recovery Mode on Xiaomi
If the problem occurs after installing the firmware beta, it’s best to roll back to a stable version. Beta versions often contain bugs that developers haven’t yet fixed, and the Wi-Fi module is no exception.
It is also worth noting that when you switch from the global version to the Chinese version (or vice versa) without complete flashing with data cleaning, critical errors in the drivers of regional modules can occur.
Physical damage and hardware malfunctions
If software methods have not worked, there is a high probability of hardware failure. Wi-Fi module in Xiaomi smartphones is often integrated into the main board or combined with a Bluetooth module. Falls, bumps or moisture can lead to detachment of contacts or microcracks on the board.
One of the signs of hardware failure is a gray (inactive) Wi-Fi power slider that doesn't respond to taps, and the phone can constantly write, "Failed to get a hold of it." IP-Address or search endlessly for networks, even when you are near a router.
| Symptoms. | Probable cause | Difficulty of repair |
|---|---|---|
| Gray slider | Chip dump or plume break | Tall. |
| Wi-Fi is turned on but does not see the network | Antenna malfunction | Medium |
| High-heating of the hull | Short circuit in the module | Tall. |
| It only works next to the router. | Weakened antenna contact | Low. |
It's important to check if the antenna connector was moving away inside the case, and if you've recently changed the screen or the back cover, the wizard might have forgotten to connect the antenna wiring, which would completely deprive the phone of the ability to pick up the signal.
⚠️ Warning: If the phone falls into water, do not try to charge it or turn on Wi-Fi. Moisture causes corrosion, and the current will accelerate the destruction of contacts.
Resetting settings to factory parameters
When all methods are exhausted, the radical but effective way is a complete reset, which will bring the phone back out of the box by removing all user data, apps and settings, and is guaranteed to eliminate software conflict.
Before starting the procedure, be sure to back up important data to the Mi Cloud cloud or to your computer. After resetting, it will be impossible to recover information without a backup.
To perform the reset, go to Settings → About Phone → Reset. Select “Erase All Data.” The phone will restart and begin the cleaning process, which can take 5 to 15 minutes.
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A complete reset eliminates 99% of the software errors associated with system file conflicts, but requires a mandatory data backup.
If, even after a complete reset and initial setup (without installing unnecessary applications), Wi-Fi does not work, this is a direct signal that hardware repair is necessary.
Diagnostics through the Engineering Menu and ADB
For advanced users, there is an engineering menu that allows you to diagnose, and by typing ##6484## in a call, you'll be taken to the hardware testing menu, and you can select the WLAN and run the module test.
If the test shows an error or freezes, it confirms a hardware problem, and you can use your computer and ADB debugging to view system logs where you can see wlan driver errors.
To view the logs, you can use the command:
adb logcat | grep -i wifiThis command will display all the wireless module-related events in real time, and a "Firmware failed to start" error will indicate a problem with the chip's microcode.
When repairs are needed in the service center
Repair of the Wi-Fi module on Xiaomi smartphones often requires soldering BGA-It is impossible to do this work on your own without professional equipment and skills. If the diagnosis shows a chip malfunction, you will need to replace the component or warm up (rebolling).
The cost of repairs depends on the model of the phone. On budget models, it is sometimes cheaper to replace the entire motherboard than to solder a single chip. On flagships, repairing the communication module is cost-effective.
Don't wait to call the experts if you notice that the phone is warming. Prolonged operation of the faulty module can damage neighboring components of the board, which will increase the final cost of recovery.