The situation when a stable internet connection suddenly disappears at the most inopportune moment is familiar to many smartphone owners. Users are especially likely to experience Xiaomi And Redmi Some users experience the Wi-Fi indicator disappearing or being replaced by a 4G/LTE icon for no apparent reason. This can be frustrating, as downloads are interrupted, video calls are dropped, and the connection to the smart home is lost.
The problem is systemic and occurs on different versions of the shell. MIUI And HyperOSOften, the problem isn't caused by hardware failure, but by aggressive system optimization that suppresses background processes to save battery life. However, driver conflicts or incorrect router settings also can't be ruled out.
In this article, we'll take a detailed look at why Wi-Fi drops on Xiaomi phones and offer effective solutions. We'll cover everything from simple reboots to in-depth engineering menu settings to restore your network stability.
⚠️ Attention: The settings interface may vary slightly depending on the MIUI version (12, 13, 14) or the new HyperOS. If you can't find the menu item, search for it in the settings.
Aggressive power saving and MIUI optimization
The most common reason why Wi-Fi drops on XiaomiThe problem lies in the proprietary power-saving system. The developers of the shell have tuned the algorithms to maximize battery life, often at the expense of background app activity and network modules. The system can forcibly disable the Wi-Fi module if it detects the device is in your pocket or the screen has been inactive for a long time.
To resolve this issue, you need to exclude the system from automatic optimization. Go to battery settings and find the section responsible for app management. Here, you should check if there's a background work restriction for system services responsible for networking.
- 🔋 Go to
Settings → Battery → Battery format(or "Power Saver") and make sure that the "Performance" or "Balanced" mode is selected, but not "Ultra". - 📱 Open
Security → Battery → Settingsand disable "MIUI Optimization" (if available in developer mode), as this item often causes network driver conflicts. - ⚙️ In the "Applications" section, find "Settings" (gear icon) and under "Activity Control" select "No restrictions".
Also worth noting is the "Wi-Fi Assistant" feature. It's designed to switch to mobile data if the Wi-Fi signal is weak, but it often malfunctions, dropping the connection even when the signal is strong.
Problems with the 2.4 GHz and 5 GHz frequency ranges
Modern routers often broadcast two networks: 2.4 GHz and 5 GHz. Smartphones Xiaomi sometimes get stuck when switching between them or try to connect to the crowded 2.4 GHz band, where the signal is unstable due to neighboring routers and microwave ovens.
If your router supports the function Smart Connect (combining networks under one name), try disabling it. Separate the networks by giving them different names, for example, Home_WiFi_24 And Home_WiFi_5Connect your phone to the 5 GHz network if you're close to your router, as it provides a more stable connection and is less susceptible to interference.
It's also recommended to change the broadcast channel in your router settings. Automatic channel selection often results in the router occupying a frequency already used by neighbors. Use Wi-Fi analyzer apps on your phone to find a free channel and statically assign it to the router settings.
Why is 5GHz better but has a shorter range?
The 5 GHz band provides high data transfer rates and is less crowded, but its waves penetrate walls and concrete floors worse than 2.4 GHz.
Resetting network settings and router configuration
Accumulated network configuration errors on your phone can cause constant disconnects. This is a classic case of a connection profile malfunction. A simple but effective solution is a full network reset. This will return Wi-Fi, Bluetooth, and mobile network settings to factory defaults.
To perform this procedure, go to the settings menu. The path usually looks like this: Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and BluetoothPlease note that after this, you will have to re-enter passwords for all known networks.
☑️ Checklist before resetting the network
Don't forget about the router itself. Extended operation without rebooting can cause the router's memory buffer to overflow, which can cause problems with IP address distribution (DHCP). Try updating your router's firmware to the latest version available on the manufacturer's website, as older versions may conflict with the new security protocols used by Xiaomi.
⚠️ Attention: After resetting your phone's network settings, saved Wi-Fi passwords may be deleted. Make sure you remember your home network password or can find it in your provider's account.
DNS conflicts and static IP addresses
A common cause of Wi-Fi showing "Connected, no internet access" or intermittent disconnections is DNS server errors. By default, your phone automatically obtains the DNS server address from your ISP, but these servers can be slow or malfunctioning.
The solution is to set up static DNS addresses, such as those from Google or Cloudflare. This often stabilizes the connection and speeds up network response. You can change these settings in the settings of a specific Wi-Fi network on your phone.
Click on the name of your network in the list of available connections (or on the arrow next to it), select “IP Settings” and switch the mode from DHCP on StaticEnter the following values in the DNS 1 and DNS 2 fields:
- 🌐 DNS 1:
8.8.8.8(Google) - 🌐 DNS 2:
1.1.1.1(Cloudflare) - 🔒 Gateway (router): usually
192.168.0.1or192.168.1.1(specified in the router settings).
It's also worth checking that your phone doesn't have a static IP address that conflicts with another device on the network. It's best to leave the IP address set to automatic (DHCP) unless you have specific network requirements.
Table: Comparison of causes and solutions
To make diagnosis easier, we've compiled the main symptoms and their corresponding solutions into a single table. This will help you quickly determine the appropriate course of action.
| Symptom of the problem | Probable cause | Solution method | Complexity |
|---|---|---|---|
| Wi-Fi turns off when the screen is off | Aggressive energy saving | Disable battery optimization for system services | Low |
| There is a network, but the Internet doesn't work. | DNS or router error | Set up static DNS and reboot the router. | Low |
| The phone does not see the 5 GHz network. | The Wi-Fi module does not support the range | Use the 2.4 GHz band or change your router | Average |
| Constant game breaks | Unstable channel or interference | Change the channel on your router, use a cable or 5 GHz | Average |
| The Wi-Fi icon has completely disappeared. | Driver or module failure | Network settings reset, firmware update, service center | High |
Hidden developer settings and engineering menu
If standard methods don't help, you can access Android's hidden settings. The "Developer options" menu (which you can activate by repeatedly tapping the build number in the "About phone" section) contains settings that affect Wi-Fi performance.
Find the "Pause Wi-Fi in sleep mode" option. Make sure it's set to "Never." Some Xiaomi models also allow you to enter a code to enter the engineering menu. ##6484## (CIT). You can test the Wi-Fi module there.
Entering the code to enter CIT: ##6484##
Path: Wireless & Network -> Wi-Fi test
In the engineering menu, you can see the actual signal strength (RSSI) and noise level. If the signal level is below -70 dBm when near the router, there may be a hardware issue with the antenna.
Is it possible to improve the signal programmatically?
There are booster apps, but they only change network priorities. Increasing the transmitter power beyond the factory limits is impossible without root access and is dangerous to the module's health.
Wi-Fi module hardware failure
When software solutions have been exhausted and Wi-Fi continues to drop, especially after the phone has been dropped or exposed to water, there may be a physical problem. In smartphones Xiaomi The Wi-Fi module is often combined with the Bluetooth module and soldered onto the motherboard.
Signs of hardware failure are:
- 🔥 The upper part of the case in the camera area gets very hot when Wi-Fi is turned on.
- 📉 The Wi-Fi icon turns gray and doesn't turn on at all.
- 💥 The phone goes into a reboot (bootloop) when trying to activate the wireless network.
In such cases, diagnostics at a service center are required. Resoldering the module or, in rare cases, restoring the contacts by heating (reballing) often helps, although the latter is a temporary measure.
⚠️ Attention: If your phone is under warranty, do not attempt to open the case or heat the circuit board yourself under any circumstances—this will void the warranty.
Frequently Asked Questions (FAQ)
Why does Xiaomi's Wi-Fi work fine during the day but drop out at night?
This could be due to automatic system or app updates that run on a schedule and overload the channel. Also, neighbors may be actively using the internet at night, creating interference on the 2.4 GHz channel. Check the update schedule and try changing to a less congested channel.