Modern Xiaomi, Redmi and POCO smartphones are equipped with advanced communication modules, but users often face unstable network operation or low data transfer speeds. The problem can lie not only in the operator’s coverage area, but also in the software settings of the MIUI or HyperOS shell, which are not always optimized by default for maximum speed. Improper DNS configuration, outdated network parameters or banal “sticking” of the communication module can turn fast 5G into a barely working EDGE.
Before you take your device to the service center, you should try a set of software methods that often solve the problem in minutes. In this article, we will discuss how to amplify the signal of Wi-Fi and mobile communication using hidden system capabilities and standard Android tools.
In some cases, the slow speed is caused by software failures of the accumulated cache of network services. Rebooting a smartphone in this case helps only temporarily, since it is necessary to reset the connection configuration. We will consider both safe methods for ordinary users, and more advanced options for those who want to dive deep into the settings of their gadget.
Diagnostics and basic inspections of equipment
The first step is always to make a basic diagnosis, which many people ignore when they try to get deep into the settings, often because of a trivial physical obstacle or condition. SIM-If the chip of the communication card is old (issued more than one) 5 It may not work properly with modern standards. 4G/LTE, Even if the tariff plan supports it, then no software crutches will help, but you need to replace it. SIM operator.
Also worth paying attention to is the protective case. Metallic or too thick silicone cases can shield the antenna module, which in Xiaomi smartphones is often located at the top or bottom of the case. Remove the case and check the signal level in the "status bar." If the number of divisions has increased, the problem is solved by replacing the accessory.
- 📶 Check the signal level at different points in the room to exclude local “dead zones».
- 💾 Make sure that SIM-The card has no physical damage and sits tightly in the tray.
- 📱 Turn off power saving mode, which may limit the operation of the network module.
It's important to understand the difference between Internet speed and signal strength. A strong signal (full scale) doesn't guarantee high speed if the channel is overloaded. However, a weak signal almost always means low speed and high ping. For accurate diagnosis, you can use the engineering menu, which will be discussed below, or third-party applications like Network Cell Info.
⚠️ Warning: If your smartphone fell or was exposed to moisture, the antenna plume inside the case could move away, in which case the software methods are useless - you need to disassemble and reconnect the antenna.
Optimizing Wi-Fi Connection Settings
Wi-Fi issues on Xiaomi are often due to frequency conflict or incorrect DNS settings. By default, routers often operate in the 2.4GHz band, which is heavily noisy by neighbourhood networks and household appliances. If your router and smartphone support 5GHz, be sure to switch to this frequency.It provides a more stable channel and high speed, although it has a smaller range.
The second important aspect is DNS-servers. Providers often provide their own DNS, They may be slow or have problems accessing some resources. DNS To public servers from Google or Cloudflare, you can significantly speed up page response. → Wi-Fi → Click on the arrow next to your network → Settings DNS.
It's also worth checking if Wi-Fi Assistant is included in your settings, which is designed to switch your smartphone to mobile Internet if the Wi-Fi signal is weak, but in practice it often doesn't work properly, creating permanent micro-connections, which is especially noticeable when playing games or video calls online.
- 🌐 Use it. DNS-Cloudflare servers 1.1.1.1 or Google 8.8.8.8 to speed up response.
- 📡 Forced to select the 5GHz band in the router settings to reduce interference.
- 🔄 Reset network settings if the problem occurs after a firmware update.
In some cases, it helps to disable the function "accidental" MAC-address (Randomized) MAC). Some routers may not properly handle a permanent change in device ID, leading to breaks. In the settings of a particular Wi-Fi network, select the privacy type "Use the device". MAC-address».
Setting up a mobile network and choosing a connection type
Mobile Internet on Xiaomi smartphones requires the correct prioritization of communication standards. by default, the system can try to hold 4G/LTE Even in the zone of a very weak signal, instead of switching to a more stable one. 3G. To avoid constant network search, you can force the preferred network type to be set.
To do this, go to the Settings. → SIM-maps and mobile networks → Choose. SIM → If you're in a city, choose "Preferred" LTE». In rural areas or when driving on transport, it sometimes makes sense to set the "Prefer to the following: 3G», This standard is better at breaking through walls and has a larger radius of coverage of base stations.
| Type of network | Speed (theor) | Stability | Energy consumption |
|---|---|---|---|
| 2G (E/GPRS) | Low. | Tall. | Minimum |
| 3G (H+/UMTS) | Medium | Medium | Average. |
| 4G (LTE) | Tall. | Depends on the coverage | High. |
| 5G | Maximum | Low (bye) | Very high. |
The Speed Assistant feature is worth noting, and the MIUI shell has a built-in tool that combines Wi-Fi and mobile data channels to speed up loading, and can be found by searching the speed-up settings, which can help if one of the channels is unstable.
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Turn on 10 seconds flight mode to force reconnect to the nearest base station, which often helps if you've been in a bad reception zone for a long time.
Resetting network settings as a radical method
If the software settings are downed or errors have accumulated in the system after multiple updates, the only working option is a complete reset of network settings. This operation does not affect your personal files, photos or contacts, but will delete all saved passwords from Wi-Fi, Bluetooth pairs and VPN settings.
Resets can be done via Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Once rebooted, the smartphone will return to the factory settings of communication modules. This often solves the problems with the “falling” Internet on new versions of Android.
☑️ Checklist before network reset
After the procedure, you need to re-authorize on all Wi-Fi networks. Note that in the first minutes after the reset, the system can actively scan the air and consume more energy until the connection stabilizes. Give the device 5-10 minutes to warm up and adapt to the current reception conditions.
⚠️ Warning: Resetting network settings will remove all stored Bluetooth devices. You will have to reconnect wireless headphones, speakers and car systems.
Engineering menu and hidden MIUI functions
For advanced users, Xiaomi smartphones have an engineering menu that allows you to control the transmitter power and select specific frequencies. The menu is logged in via the code set ##4636## in the Phone app. If the code does not work, you can activate it through the Activity Launcher app by finding the "Testing" activity.
In the Phone Information section, you can find "Set Preferred Network Type," where you can test the mode that catches better in your area, and you can also see the actual strength of the signal in dBm. A value closer to -50 dBm is a great signal, and values below -110 dBm indicate critically poor reception.
Is it dangerous to change the settings in the engineering menu?
Another hidden feature is Carrier Aggregation, where in some cases, when a phone tries to combine multiple frequencies for speed, but the signal on one is weak, the overall speed drops. Forced Band selection through an engineering menu or applications like Force LTE Only (4G/5G) can stabilize the connection.
- 🔧 Use the code #4636## to access the diagnostics.
- 📶 Keep an eye on dBm: the smaller the modulus number, the better the signal.
- 🚫 Don't change the settings. IMEI Calibration of antenna without professional equipment.
Impact of System Updates and Third Party Applications
Often, users notice a deterioration in communication immediately after a firmware update, which is because new versions of Android may otherwise manage the power saving of the radio module. If the problem occurs after the update, you should wait a couple of days until the system does not optimize, or consider rolling back on the previous version if the problem is critical.
Third-party applications, especially memory cleaners or aggressive antiviruses, can also be the cause. Check the list of installed apps and try to remove those that have access to the network and run in the background. Xiaomi’s built-in Security antivirus does a good job of basic protection.
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The stability of the Internet on Xiaomi often depends on the balance between energy saving and radio performance. Disabling aggressive battery optimization for the browser or messenger can solve the problem of cliffs.
In conclusion, it is worth noting that the hardware limitations of a smartphone (modem model, antenna design) can not be bypassed software. If your Xiaomi does not physically catch a signal in a particular location where other phones work perfectly, it may be due to the design features of this model or its technical condition.