The situation of a Xiaomi smartphone suddenly losing its network or showing only one stick in the zone of confident reception is familiar to many users. This can occur due to software failures, improper network settings, or even physical obstacles blocking radio waves. Owners of Redmi and Poco devices often find that standard algorithms for switching between towers work incorrectly, especially in dense urban areas or in rural areas.
Before you look for complex technical solutions, you should rule out trivial causes, such as overheating of the device or temporary failure of the communication module. The signal of the cellular communication depends on the quality of the antenna and its interaction with the operator's base stations. If you are on the move, the phone can "clung" to the withdrawing tower instead of switching to the nearest one, which leads to connection breaks and a drop in Internet speed.
In this article, we will look at proven methods that will help stabilize the connection. We will look at both the software settings of the MIUI and HyperOS system, and more advanced methods through the engineering menu. The most effective way for older models is to force 3G switching in the area of poor 4G coverage. Follow the instructions consistently to find a solution for your case.
Basic checks and reboot of communication modules
The first step should always be basic diagnostics, which many ignore when they go straight to complex settings. Often the problem lies in a suspended network module that stops scanning the airwaves correctly. A simple reboot of the device can clear up temporary errors and force the phone to re-register in the operator's network with better parameters.
If a simple reboot didn't work, try to switch flight mode. This action forcefully shuts down all radios and then turns them on again. This method is often more effective than a conventional reboot, because it resets exactly the network settings without completely shutting down the system. Make sure you wait at least 10-15 seconds in flight mode before it shuts down.
It is also worth checking the physical condition. SIM-Contacts may have oxidized or contaminated, which directly affects the reception quality. Remove the tray, wipe the card chip with a soft dry cloth and make sure it sits tightly in the slot. Sometimes reinstalling the SIM card into another slot helps if your Xiaomi supports two cards.
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If you have a two-sim phone, try leaving only one. SIM-In Dual-SIM mode, one of the modules can run standby (2G), Reduces the overall signal level of the main card.
⚠️ Note: If after removal SIM-The phone says no to the card. SIM», The problem may be in the tray or the slot itself.Do not use sharp objects to clean the slot so as not to damage the contacts.
Configure the preferred type of network
Modern smartphones tend to connect to the fastest available network by default, usually 4G or 5G. However, in areas of uncertain reception, constantly switching between standards (for example, from 4G to 3G and back) can completely “kill” the stability of the connection.
To access these settings, go to the Settings menu → SIM-Select the right SIM card and click on Network Type, and here you will see a list of available standards. If you are in a basement, a countryside or an old building with thick walls, the signal 4G It may be very weak but intermittent.
In this situation, it makes sense to switch to 3G (WCDMA) Internet speeds will be lower, but voice communication will become stable, and the battery indicator will cease to quickly drain from constant network searches. For older Redmi Note models, this is often the only way to stay connected when traveling.
Using 2G (EDGE/GSM) only makes sense in extreme conditions, when it doesn't catch even 3G. This standard provides the lowest data rate, but has the longest signal range. If you just need to receive an SMS or make a call, this mode will save the situation.
Resetting and configuring APN access points
Often the problem is not the signal level, but the wrong configuration of APNs (Access Point Name), which are the settings that a phone has to set up, how to connect to the operator's Internet, and if this data is lost or outdated after switching from a different tariff, the Internet may not work even at full signal level.
To fix this, go to the Settings path. → SIM-maps and mobile networks → (Yours. SIM) → Access points (APN). In the menu that opens, click Reset (usually at the bottom of the screen or in the three-dot menu) and this will return factory settings to your operator.
If automatic reset didn't work, you can create a new access point manually. You need your operator's data (MTS, Beeline, MegaFon, Tele2), which is easy to find on the official website. It is important to enter APN (the name of the access point), for example, Internet.mts.ru for MTS. Other fields can often be left empty or by default.
☑️ Checking settings APN
When you make changes, be sure to restart your device. Sometimes the system doesn't apply the new network settings until the full on-off cycle. This is standard procedure for applying network configurations in Android.
Using an engineering menu to select frequencies
For advanced users who want to gain full control of the radio module, there is an engineering menu, which is a hidden part of the system that allows you to control the LTE frequencies and other antenna parameters. Be careful: improper changes can lead to loss of communication, but they are easy to return back with a reset.
To enter the menu, open the Phone app and dial the code ##4636##. If the code is not working (it is blocked on some firmware), you can use the Engineering Mode app from the Play Market store, which requires access or use rights. ADB-activation.
From the menu that opens, select Phone Information. Scroll down to Set Preferred Network Type. Here you can select specific frequency ranges. For example, choosing only LTE Band 3 or LTE Band 7 can help if you know what frequencies your carrier is using in a given area.
| Parameter | Description | Recommendation |
|---|---|---|
| NR Only | Only 5G networks. | Use only in 5G areas with confidence |
| LTE Only | Only 4G networks. | For a stable internet, but there may be calls problems (VoLTE) |
| WCDMA Only | Only 3G. | Improved communication in the village or basement |
| GSM Only | Only 2G. | Emergency calls only if 3G/4G is not available |
What to do if the sound is lost when choosing LTE Only?
Remember that selecting LTE Only mode can block incoming calls if VoLTE service is not configured. Use this mode primarily for sharing the Internet or downloading files.
Influence of covers and physical obstacles
Don’t underestimate the impact of accessories on reception quality. The antennas in Xiaomi smartphones are often located around the perimeter of the case or at the top/bottom of the back cover. If you use a case with metal inserts, magnetic rings for car owners or just a very thick protective layer, it can shield the signal.
Metal is a major obstacle to radio waves. A magnetic ring glued directly onto an antenna module can lower the signal level on a radio. 10-15%, If you're in the border zone, you'll see if you can get the cover off and check the signal level in the same place.
Also note how you hold your phone: Closing the antenna area (often the lower end or side faces) with your hand causes the "death grip" effect that is characteristic of many smartphones.
⚠️ Warning: Do not use homemade foil amplifiers, antenna stickers, or other products from marketplaces that promise to amplify the signal. At best, they are useless, at worst, they create additional interference and put the battery on the ground.
Resetting network settings to factory
If software failures have been accumulating for a long time, a complete reset of network settings may be required, which will return all Wi-Fi, Bluetooth and mobile network settings to the “out of the box” state, and it is important to understand that this will not delete your personal files, photos or contacts.
However, you will have to re-enter passwords from all Wi-Fi networks and re-enter Bluetooth devices (earphones, watches, speakers).
To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Click Reset and confirm the action with a pin code or pattern lock. Once rebooted, the phone will start searching for networks as a new device.
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Resetting network settings eliminates configuration conflicts that arose after a firmware update or operator change, but requires reconfiguration of Wi-Fi and Bluetooth.