The situation when a Xiaomi smartphone suddenly disconnects the wireless network, familiar to many users. the device can stop seeing the router, constantly looking for a connection or just give out a connection error. Unstable signal often causes interrupted video calls and unloaded pages.
It's not always a problem with the gadget itself, but sometimes it's the MIUI firmware updates that change the communication modules, or the power saving setting conflicts, and understanding the root of the problem is the first step to fixing it without going to the service center.
In this article, we will look at the software and hardware causes of failures, how to correctly diagnose the condition of the module and what hidden features of the system can interfere with the stable operation of the Internet. A common cause of breaks on new versions of Android is aggressive energy saving, which kills background Wi-Fi processes.
Software failures and system updates
One of the main reasons why Xiaomi loses Wi-Fi is software errors: Once you install the next MIUI or HyperOS update, the system may not work properly with network module drivers, which is especially true for beta versions of firmware or global updates that come out immediately after release.
Sometimes network services cached data conflicts, and the system tries to use old configurations for new security protocols, which leads to breaks, in which case it helps to clear temporary files or completely reset network settings to factory values.
You should pay attention to the installed applications. VPN-Services or programs to speed up the Internet can intercept control of the communication module. If after installing such software, you start to delete it and check the network.
Energy saving settings and background processes
Xiaomi is famous for optimizing autonomy, but sometimes it works too aggressively, and the system can force you to turn off the Wi-Fi module if you think you're not using it at the moment, or if the battery has dropped below a certain level, which causes the connection to break at the most inopportune moment.
To check the settings, you need to go to the application management menu, find the system process that controls Wi-Fi, and make sure it is allowed to work in the background, often users limit background activity without knowing the consequences.
⚠️ Warning: Turning on Super-Energy Saving is almost guaranteed to turn off background synchronization and may break a stable connection to the router.
You should also check your sleep settings, and if your phone falls asleep and loses the network immediately, you have a data transfer restriction in your sleep settings, and turn off the option to "Switch off Wi-Fi while you sleep" in the advanced wireless network settings.
💡
Try temporarily disabling Adaptive Connection in your Wi-Fi settings, which tries to switch between mobile internet and Wi-Fi, which sometimes causes short-term breaks.
Router diagnostics and frequency ranges
It's not always the smartphone's fault. It can be on the access point side. If the router is overloaded with many connected devices or is too far away, the Xiaomi phone will constantly lose its signal, especially in apartment buildings where the air is full of signals from neighbors.
Frequency range is an important parameter. Modern routers operate in the 2.4 GHz and 5 GHz bands. The 5 GHz range provides high speeds, but has a shorter range and passes through walls worse. If you are far from the router, the phone can constantly "fly" out of the 5 GHz network.
You can use special scanner apps available on Google Play to analyze the situation, which will show the load of channels and signal level, and if all the neighboring routers are running on the same channel, there may be interference.
| Parameter | Range 2.4 GHz | 5 GHz range |
|---|---|---|
| Range of action | High (up to 50 meters) | Medium (up to 20 meters) |
| Permeability of walls | Good. | Bad. |
| Transmission speed | Up to 150-300 Mbps | Up to 800+ Mbps |
| Level of interference | Tall (many neighbors) | Low. |
💡
If the phone only loses network in the back room, try switching from 5GHz to 2.4GHz for stability, even if the speed is lower.
Reset network settings and TCP/IP configurations
When simple methods fail, you need to reset your network settings, which will return all connection settings to factory values by removing stored passwords and Bluetooth settings, which often resolves the problem if the system has accumulated a logical configuration error.
To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Confirm and wait for the modules to reboot. After that, you will need to re-enter the password from your home network.
☑️ Checklist before resetting settings
A more advanced method is to reset the TCP/IP stack via an engineering menu or ADB, but on modern versions of MIUI this is often blocked, so standard resetting through settings remains the safest and most efficient way for the average user.
The Effects of Static IP and DNS
Sometimes automatic receipt IP-address (DHCP) It doesn't work properly, especially if there are many devices on the network, and the router can give the same addresses to different gadgets, causing conflict, which causes Xiaomi to lose the connection. IP.
Go to your Wi-Fi network settings on your phone, click on the arrow or network name to reveal details. Find IP settings and switch from DHCP to Static. You can leave the address offered by the system or change the last digit, for example, to 128.
It is also worth trying to change. DNS-Servers. Standard ISPs. DNS They may be slow or have failures. DNS Google (8.8.8.8) or Cloudflare (1.1.1.1) often stabilizes the connection and speeds up page response.
⚠️ Attention: When manually entered IP-Make sure the gateway is correctly placed, usually 192.168.0.1 or 192.168.1.1. An error in the gateway will shut down the Internet completely.
Hardware problems of the Wi-Fi module
If software methods are powerless, perhaps the problem lies in the hardware. In Xiaomi smartphones, the Wi-Fi module is often combined with the Bluetooth module. If you have both Bluetooth and wireless network malfunctions at the same time, there is a high probability of hardware failure of the chip.
The cause may be overheating of the body. During prolonged load (games, navigation), soldering of the module's contacts may be disrupted due to temperature expansion, and there may be consequences of falls or moisture, even if the phone has IP protection.
Symptoms of hardware breakdown
In such cases, diagnostics are required in the service center. Self-repair of the Wi-Fi module on Xiaomi smartphones is difficult, as often you need to solder over. BGA-components or replacement of motherboard.
Hidden Developer Settings
The developer menu has settings that affect the radio module, and you can get there by quickly tapping 7 times the build number in "About Phone," and you can find settings that force Wi-Fi behavior to change.
Find the option “Use Wi-Fi even in sleep mode” and set the value “Always.” Also pay attention to the option “Aggressive switch to mobile network.” If it is on, the phone will constantly try to go to 4G/5G at the slightest weakening of the Wi-Fi signal, which is perceived as a departure.
The path to the developer menu:
Settings → About phone → (7 times tap on "Version MIUI") →
Additional → For DevelopersDon’t change the Wi-Fi values unless you’re sure they’re there. For example, enabling lower-level security protocols can make the network vulnerable, but in rare cases, it can help connect to very old routers.