When a Xiaomi, Redmi or POCO smartphone suddenly stops wireless, it causes panic among most users, and the phone becomes a communication brick if the mobile Internet is not available or too slow to download content, often the problem is not a complex breakdown, but a simple software failure of the MIUI or HyperOS operating system.
Before you take the device to the service center, you should do your own diagnostics. In 80% of cases, the module malfunction is temporary and is corrected by rebooting services or resetting network settings.
In this article, we will discuss in detail why Xiaomi’s phone does not turn on Wi-Fi, and propose a step-by-step algorithm for actions. We will look at both software methods and signs indicating the need to replace the Wi-Fi antenna or chip on the motherboard.
Software failures and service freezes
The most common reason a Wi-Fi slider turns gray or shuts down immediately after turning on is because of the operating system. Android is a complex system, and background processes sometimes conflict with each other, which can occur after installing a questionable app or a failed firmware update.
Often, a simple reboot helps, but not a normal shutdown, but a full restart cycle of the system. If you keep your finger on the power button for more than 10 seconds, the phone will forcibly restart, clearing the RAM of temporary errors. In some cases, you need to enter the recovery mode to clear the cache.
💡
Before performing complex manipulations, be sure to back up important data in the cloud or on your computer.
It's also worth checking if the In-Air mode is activated. Sometimes the system sticks in that state, locking all the radios. Try activating the Aeromode, waiting 10 seconds and turning it off. If the Wi-Fi slider is still inactive, the problem is deeper.
💡
90% of the communication module software errors are solved by completely restarting the device or resetting the network settings.
Settings conflicts and third-party applications
Install applications to “accelerate the Internet” or VPN-These programs alter the routing tables, blocking the normal operation of the wireless adapter, and if a problem occurs immediately after the installation of such software, it must be removed.
Another reason may be incorrect date and time settings: WPA2/WPA3 security protocols require time synchronization with the server; if the phone has an incorrect date, the connection to the router will be broken or not installed at all; check if the option “Use network time” is enabled.
- 📱 Remove newly installed applications that have access to the network.
- 📅 Check the automatic date and time synchronization in the settings.
- 🔒 Turn it off. VPN Proxy servers in Wi-Fi settings.
- 🔄 Reset network settings to factory values.
Importantly, some third-party “optimizers” may aggressively shut down the system processes that scan networks, leading to the phone simply “not seeing” the available access points even though the module is formally enabled.
Diagnostics through the Engineering Menu and Safe Mode
For deep diagnostics of the module, Xiaomi has an engineering menu that allows you to check the hardware performance regardless of the user's settings. To get there, type ##6484## in the Phone app, which will open the CIT (Customer Integration Test) menu.
In the test list, find a WLAN or Wi-Fi item. Run a test. The system will try to turn on the module and scan the air. If the test shows Fail or the module does not respond, it is a direct signal of a hardware problem. If the test is successful, then the problem is in the software or application conflict.
⚠️ Warning: Do not change the settings in the engineering menu unless you are sure of your actions. Incorrect calibration can lead to complete failure of communication.
Also effective is downloading to Safe Mode, which only runs system applications, and if you have stable Wi-Fi in Safe Mode, it's one of the apps you've installed that's to blame. Start removing the software you've recently downloaded.
How to get into Safe Mode on Xiaomi?
Resetting network settings and flashing
If simple methods don't work, you need to reset your network settings, which will delete all stored Wi-Fi passwords, Bluetooth and mobile network settings, returning them to factory values, often helping if configuration files have accumulated errors.
To perform the reset, go along the path: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. After that, the phone will reboot. You will have to re-enter passwords from routers, but this is a necessary step to eliminate software configuration errors.
☑️ Checklist before resetting settings
In extreme cases, if the problem has occurred after the system update, you may need to completely flash the device. Use the official Mi Flash Tool utility or the recovery function through Settings. → The phone. → Update MIUI/HyperOS. Selecting a firmware file manually (through three dots in the corner) allows you to reinstall the system with data storage or complete cleaning.
Hardware problems: from antenna to chip
When software methods are exhausted, we have to talk about hardware. The most common hardware cause is the dumping or damage to the antenna module. The antenna plume in Xiaomi smartphones often passes next to the battery or buttons and can move away when falling.
A more serious problem is the failure of the Wi-Fi/BT module (chip), which is soldered on the motherboard, which can occur due to overheating, moisture or a surge in voltage when charging with a poor-quality power supply, in which case the slider in the settings often becomes gray and inactive.
In some models, short circuits in the USB-C port can affect the operation of adjacent modules, including wireless communication. If the phone recently fell or came into contact with water, the probability of hardware failure is as high as 100%.
💡
If the phone falls, gently tap your finger on the back cover around the camera, sometimes the antenna contact is restored temporarily, confirming a mechanical cause.
Comparative table of symptoms and solutions
For ease of diagnosis, we have compiled the main symptoms and probable causes into a single table, which will help you quickly navigate the nature of the malfunction of your Redmi or Xiaomi device.
| Symptoms. | Probable cause | Method of decision | Difficulty |
|---|---|---|---|
| Gray slider, no turning on | Driver failure or chip failure | Resetting settings / Board Repair | Tall. |
| Sees the network, but doesn't connect | Password or protocol error | Forget the network / Change router | Low. |
| Constantly losing connection | The antenna problem | Replacement of antenna plume | Medium |
| Brake the Internet over Wi-Fi | Channel loading | Changing router channel | Low. |
| He doesn't see any networks. | The antenna contact dump | Disassembly and contact verification | Medium |
As you can see from the table, simple problems are solved quickly, but symptoms associated with a gray slider most often require intervention in "iron." Don't ignore the signs, especially if the phone has previously been mechanically impacted.
When repairs are needed in the service
If factory reset and flashing didn't work, and the Wi-Fi test failed on the engineering menu, self-repair can be dangerous. Professional diagnostics using a multimeter and a thermal camera to find short circuits on the board are required.
The wizards in the service can replace the Wi-Fi module or restore the power chain. At home, without a soldering station and flux, this is impossible. Attempting to heat the board with a hairdryer (warm-up method) gives only a temporary effect and often finishes the device completely.
⚠️ Warning: Opening the phone body on your own deprives you of an official warranty.
The cost of repair varies by model, and replacing the antenna plume is inexpensive, whereas soldering the chip on the motherboard can cost a significant amount, and in some cases it is easier to replace the motherboard entirely.
💡
If after resetting all settings and flashing Wi-Fi did not work - it is 100% hardware breakdown, requiring soldering.
Prevention and proper operation
To avoid problems with wireless modules in the future, try not to overheat the smartphone. Prolonged games at maximum graphics settings lead to thermal expansion of components, which over time disrupts the soldering contacts (the BGA dump effect).
Use only original or certified cables and power supplies. Cheap charging often gives power surges that can damage power and communication controllers. Also avoid bumps and falls, especially at the corners of the case.
Update your software regularly. Xiaomi engineers are constantly releasing patches that improve the stability of radio modules. Ignoring updates can leave you with known bugs that have already been patched by developers.