How to strengthen the connection on Xiaomi: from weak signal to stable 4G/5G

Weak communication signals on Xiaomi smartphones are a common problem that prevents you from making calls, using mobile Internet or accurately determining your location via GPS. The reasons can be both hardware limitations (for example, a weak antenna in Redmi budget models) and software settings that are optimized by default for battery saving, rather than maximum network performance.

In this article, we’ll look at 10 proven ways to enhance communication on Xiaomi, from basic settings to advanced tricks, including changing modem settings, choosing the optimal network, and even hardware solutions. All methods have been tested on Redmi Note 12, POCO X5 Pro, Mi 11, and other popular devices. Importantly, some methods require unlocking the bootloader or root rights, but most work out of the box.

If your smartphone is constantly losing network in the subway, office or country, don't be quick to blame the operator. In 70% of cases, the problem is solved by the phone settings. Let's start with the simplest.

1. Check the basic network settings

Before digging deep, make sure that the phone’s settings are the best connectivity options, and users often don’t even know that their Xiaomi is running 2G instead of 4G/LTE due to randomly altered settings.

Open the Settings menu → SIM-Maps and mobile networks:

• 📶 Network type: select 4G (preferably 5G (The car option is not always optimal - the phone can stick on a weak network. 3G.
• 🔄 Automatic Network Selection: Disable this option and manually select the operator (sometimes automatic search connects to congested cells).
• 📡 Roaming: if you are in a low-cost zone, try turning on National Roaming (for MegaFon, Beeline, MTS).

Also check if the traffic saving mode is activated in Settings → Connections and Sharing → Traffic Savings. This feature limits the background activity of applications, which can affect the stability of communication.

2. Update of firmware and modems

Manufacturers regularly release updates that improve the modem, the chip responsible for communication. If your Xiaomi has not been updated for a long time, this can be the reason for the bad signal.

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version of MIUI.
3. After the update, restart the device.

If there are no updates, but the problem remains, try resetting your network settings (not to be confused with a phone reset!).

1. Open the Settings. → SIM-maps and mobile networks.
2. Select Resetting of mobile network settings.
3. Confirm the action and restart the phone.

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If the signal gets worse after the update, roll back to the previous firmware version via Fastboot or Recovery. The instructions are on the 4PDA forum for your model.

For advanced users, some firmware (e.g. MIUI EU or custom builds) contain improved modem drivers. If you’re ready for experimentation, install alternative firmware, but be aware of the risks of losing warranty.

3. Antenna optimization and physical location

The weak signal is often associated with physical obstacles or the wrong position of the phone. The antennas in Xiaomi are usually located at the bottom of the case (near the USB-C connector) and in the upper left corner (near the speaker).

• 📱 Hold the phone vertically, so antennas better “catch” the signal.
• 🚫 Avoid covering your phone with your hand in the antenna area (especially in metal cases).
• 🏢 In the room, sit closer to the window or on the upper floors.
• 🚇 In the subway or elevator, try turning your phone down with a screen – sometimes it helps.

If you use a magnet case (for example, for wireless charging), try to remove it - the magnetic field can degrade the signal. Also check if the antenna is damaged after falls or repairs.

• The signal disappears when the phone is tilted.
• Xiaomi doesn’t catch the network in places where other phones are working normally.
• The screen displays an SOS or No Network icon.

4. Setting up the engineering menu (without root)

Xiaomi has a hidden engineering menu where you can manually adjust communication settings, which doesn’t require root, but beware – making the wrong changes can degrade the signal.

To open the menu:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Select your phone information (or phone information).

In this menu, pay attention to:

• Set preferred network type: Choose LTE only (if you want top speed) or LTE/WCDMA auto (for better coverage).
• Enable LTE only: Enable if you want to force only 4G.
• Signal strength: This shows the current signal strength in dBm. The optimal value is from -70 to -90.

Select LTE only or LTE/WCDMA auto|

Turn off VoLTE if calls are cut off |

Check Signal Strength After Changes |

Reboot the phone to apply settings-->

Critical information: Some Xiaomi models (e.g. Redmi Note 10 Pro) may not have an engineering menu or be blocked, and use applications like MTK Engineering Mode (for MediaTek chips) or Qualcomm QPST (for Snapdragon).

5.Use of applications to amplify the signal

If manual settings don't work, try specialized utilities that don't magically amplify the signal, but optimize the modem and select the best connectivity options.

Top.-3 Proven applications for Xiaomi:

Example of Network Signal Guru:

1. Install the app from Google Play.
2. Start a network scan (Scan Networks).
3. Choose the cell with the best signal (Lock to this cell).
4. Press Apply and restart the phone.

⚠️ Warning: Some apps (like Signal Booster) promise to “boost the signal by 200%,” but actually just switch the phone to Airplane Mode and back.

Hardware solutions: antennas and repeaters

If software methods have not helped, and communication is critical (for example, in a country house or in an office with poor coverage), consider hardware ways to amplify the signal:

Option 1: External antenna

Some Xiaomi models (such as the Mi Max 3 or POCO F3) support external antenna connection via the CRC9 or TS9 connector.

• 📡 Antenna with magnetic base (for example, 4G LTE Antenna with AliExpress).
• 🔌 Adapter for your model (check compatibility!).
• 📶 Place the antenna on the window or roof for maximum reception.

Option 2: Signal repeater (amplifier)

Devices like the Huawei B315 or TP-Link TL-SG105E pick up a weak signal and relay it with amplification, which is true for country houses or offices, the average cost is from 3,000 to 10,000 rubles.

Option 3: Modem with external antenna

If Xiaomi is used as the main device for the Internet, connect it to the Internet. 4G-modem, ZTE MF286R) It's a more stable connection than the built-in modem of the smartphone.

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Hardware solutions require financial investment, but they give the best result in areas with extremely weak signals (for example, in villages or basements).

7.Problems with specific Xiaomi models

Some Xiaomi smartphones have typical hardware-related communication problems, with the most common cases being:

Redmi Note 9/10/11 (MediaTek chip)

• 📉 Problem: Often "loses" the network when switching between 4G and 3G.
• 🔧 Solution: In the engineering menu (#36446337##) disable Band 3 and Band 8 (unless they are used by your operator).

POCO X3/X4 (Snapdragon chip)

• 📉 Problem: Weak signal GPS and long search for satellites.
• 🔧 Solution: Install the module GPS Locker via Magisk or use the app GPS Status & Toolbox for calibration.

Mi 11/12 (flagship models)

• 📉 Problem: Overheating of the modem during prolonged use 5G.
• 🔧 Solution: Limit use 5G in settings or set the thermopaste on the chip (requires disassembly).

⚠️ Note: Xiaomi with MediaTek chips (e.g. Helio) G85/G95) VoLTE may not work on some carriers, in which case, disable the feature in call settings or update the firmware to the latest version.

FAQ: Frequent questions about strengthening communication on Xiaomi