Smartphone owners Xiaomi, Redmi And Poco Often encounter a situation where the internet on a device is unstable, despite a strong signal on other devices. The problem may lie not only with the provider, but also with specific shell settings. MIUI or HyperOS, which aggressively manage power saving by limiting the operation of the communication module. Connection speed drops and the ping jumps, making it impossible to work comfortably or play online games.
The solution lies in a comprehensive approach: from a simple service restart to a thorough adjustment of frequency ranges. AndroidSystems from Chinese manufacturers have many hidden parameters, changing which can dramatically alter the signal reception quality. In this article, we'll discuss proven methods that will help you boost the signal and stabilize the connection without purchasing expensive equipment.
Before moving on to complex troubleshooting, it's worth ruling out obvious hardware issues or temporary software glitches. Often, the problem can be solved in a couple of minutes with simple steps that many forget in their quest for "secret codes." Let's start with basic diagnostics and configuration of the router and phone.
Basic diagnostics and service restart
The first thing you should do if you encounter problems with your wireless network is to perform a full hardware reboot. Don't just turn off your smartphone's screen. You need to completely reboot the device to clear temporary files from the RAM and reset frozen processes. WiFi moduleAt the same time, it is recommended to reboot the router itself, as it is also a mini-computer that can accumulate errors in its logs.
If a simple reboot doesn't work, try "forgetting" the problematic network. This deletes saved authentication parameters and IP address configurations for a specific access point. You'll then be prompted to re-enter the password, which often helps if the router has changed channel or security settings and the phone is trying to use it. outdated data.
⚠️ Note: Deleting a network will erase all saved passwords for it. Make sure you remember the access key or save it on another device to avoid being left without internet access.
Another effective method is resetting network settings. This doesn't affect your personal files, photos, or apps, but it does reset all connection-related settings to factory defaults: Bluetooth, mobile data, and WiFi. This is especially useful if you've recently updated your firmware. MIUI and noticed a deterioration in communication.
- 📶 Go to the "Settings" menu and find the "Connection and Sharing" section.
- 📶 Select "Reset WiFi, mobile networks, and Bluetooth."
- 📶 Tap the "Reset settings" button at the bottom of the screen and confirm the action.
- 📶 After rebooting, reconnect to your network.
☑️ Basic connection check
Frequency Band Optimization: 2.4 GHz vs. 5 GHz
Modern routers operate in two main bands: 2.4 GHz and 5 GHz. Smartphones Xiaomi automatically select the most suitable one, but sometimes the algorithm makes mistakes. Range 2.4 GHz It has better penetration through walls, but it is heavily loaded with neighboring networks and household appliances, which causes interference and reduces speed.
Range 5 GHz Provides much higher data transfer rates and is less susceptible to interference, but its signal fades faster when passing through obstacles. If your router is dual-band, it's a good idea to force your phone to switch to 5 GHz when you're in the same room as the router. This often solves the problem of slow download speeds.
To switch bands on some firmware versions, you need to click on the network name in the list of available ones and select a priority. If this option isn't available, you can separate the network names (SSIDs) in the router settings by adding the suffix "_5G" to the second network name and connect to it manually.
| Parameter | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Speed | Low / Medium | High / Maximum |
| Range | High | Medium / Low |
| Permeability of walls | Good | Bad |
| Workload | High (a lot of interference) | Low (pure ether) |
How to check the current connection frequency?
To find out what frequency you're using, go to Settings → About phone → All settings → Tap "Kernel version" 5-7 times (to enter the engineering menu, if available) or use the WiFi Analyzer app. In the standard Android menu, tapping the gear icon for your active network will often display a "Frequency" or "Link speed" field (above 400 Mbps usually indicates 5 GHz).
Power saving settings and background activity
One of the main reasons why Xiaomi The reason for poor WiFi performance is aggressive battery optimization. The system can disable the wireless module or limit its power when the screen is off or the app is minimized. This is designed to save battery life, but often compromises connection stability.
To fix this, you need to adjust settings for specific apps or globally. Go to battery settings and find the power mode. If "Power Saving Mode" is selected, switch to "Balanced" or "Performance." It's also worth checking the settings for individual apps that require constant network access (such as messaging apps or navigation apps).
In the "Battery & Performance" menu, find "Activity Monitoring." Here you can prevent the system from putting important apps to sleep. There's also a hidden setting called "Keep WiFi connected while sleeping," which you should definitely enable to prevent your phone from disconnecting in the background.
- 🔋 Open Settings → Battery & performance.
- 🔋 Go to the mode settings (gear or top menu).
- 🔋 Select "Unlimited" mode for critical apps.
- 🔋 In the advanced WiFi settings, enable the "Keep WiFi on while sleeping" option.
Changing DNS servers to speed up response times
Often the problem is not in the speed of packet transmission, but in the slow response of domain name servers (DNS). By default, providers use their own servers, which can be slow or buggy. Changing your DNS to public, fast servers from Google or Cloudflare can significantly speed up page loading and app launches, even if your signal strength remains the same.
In the shell MIUI And HyperOS There's a built-in "Private DNS" feature that works system-wide, not just for a single WiFi network. It's a modern DNS-over-TLS protocol that also encrypts your requests, increasing security. Setting it up doesn't require root access.
Enter the hostname of a trusted provider in the settings field. Cloudflare and Google servers are considered the most stable. After applying the settings, your phone may disconnect for a second to reconnect with the new settings. If your internet connection is lost completely, return it to "Auto."
dns.googleor
1dot1dot1dot1.cloudflare-dns.com⚠️ Important: Please enter the DNS server address exactly, without the http:// protocol or extra spaces. A single character error will result in complete loss of WiFi internet access.
Resetting network settings via the engineering menu
For advanced users who have not been helped by standard methods, there is access to the engineering menu AndroidThis is a hidden section designed for equipment testing by plant engineers. Here you can force a restart of the radio module or check the signal strength in digital form (dBm).
To access the menu, open the Phone app (dialer) and enter the combination ##6484##This will open the CIT (Customer Information Test) menu. Find the item related to WLAN or WiFi. Here you can run a signal reception test. If the graph shows sharp drops, there may be a hardware issue.
Also, in some firmware versions, a reset via code is available ##7780##, but it resets all settings (except for media files), so use it with extreme caution and only after creating a backup. A safer option is to find the "WLAN Test" option in the CIT menu and simply run the test, which sometimes "shakes" the drivers on its own.
Hardware limitations and cases
Physical factors also play a role. Antennas in smartphones Xiaomi These are often located at the top or bottom of the case. A thick metal case, a case with a magnetic clasp, or simply a thick layer of plastic can shield the signal, reducing its strength by 10-15%. Remove the accessory and check if the reception improves.
It's also worth considering that budget models may have less powerful antenna modules than flagships. If the phone is placed on a metal surface or near a microwave, connection quality will inevitably degrade. Metal surfaces reflect radio waves, creating "dead zones."
Check the integrity of the charging port. In some models, the antenna contacts may be connected to structural elements, and a strong impact or exposure to moisture can cause the connection to be damaged, resulting in constant disconnections.
- 📱 Remove the case and check the signal level.
- 📱 Move your phone away from radiation sources (microwave oven, baby monitor).
- 📱 Do not place your phone screen down on metal surfaces.
- 📱 Check if the antenna area is covered by your hand in horizontal mode (while playing).
Frequently Asked Questions (FAQ)
Why does Xiaomi see a WiFi network but not connect to it?
Most often, this is an IP address conflict or an incorrect password stored in the cache. Try selecting "Delete Network" (Forget) in the WiFi settings, then reboot the router and phone. If that doesn't help, check if MAC address filtering is enabled in the router settings.
How to turn on the WiFi antenna at full power on a Xiaomi?
Officially, there's no such button, as the power is limited by the laws of the country of sale. However, disabling power saving mode and using "Performance" mode indirectly allows the module to operate more reliably. Third-party apps from the Play Market don't provide any real power boost.
Can updating MIUI worsen WiFi signal?
Yes, this happens. New firmware versions sometimes contain bugs in wireless drivers. If the problem appears immediately after an update, you should wait for a patch or, if you have the necessary skills, roll back to the previous stable software version using the MIUI Downloader website.
What should I do if my WiFi disconnects on its own after 5 minutes?
This is a classic symptom of the power saving feature. Check your WiFi sleep settings ("Keep WiFi on while sleeping") and make sure background apps aren't restricted to "Limit background activity."