How to enhance the signal of cellular communication on the Xiaomi phone: from settings MIUI to external antennae

Have you noticed that your Xiaomi has become worse at catching the network in familiar places? 4G-The problem of a weak signal of cellular communication is familiar to many owners of smartphones, but it is especially acute on Xiaomi devices due to the features of firmware MIUI In this article, we will discuss 7 working ways to improve network reception, from basic settings to advanced technical solutions.

A weak signal isn't always the fault of the phone, and often the problem is the distance from the tower, the interference from buildings, or even the problem with the phone. SIM-However, Xiaomi (especially the Redmi Note, Poco and old Mi A models) have specific “diseases”: automatic network settings are sometimes reset after updates, and budget modifications save on quality antennas. Before you run for a new phone or repeater, try the techniques from this article – many of them don’t require money and take less than 5 minutes to get your hands on.

It's important to understand that 100 percent signal amplification is impossible without physically approaching a tower or mounting an external antenna, but even in a low-coat area, you can achieve stable connection for calls and messengers if you set your smartphone correctly and eliminate software failures, starting with the simplest.

1. Checking the current signal level and diagnosing problems

Before you change anything, you need to understand how bad the signal is and what exactly is interfering with the connection. Xiaomi has hidden diagnostic tools that don't show standard indicators.

To see the exact network data, go to the engineering menu:

1. Open the Phone app and dial ##4636##.
2. Select Phone Information (or Phone Information).
3. Scroll down to the Signal strength block – here the signal level in dBm (decibel-milliwatt) is displayed.

Focus on these values:

• 📶 -50...-70 dBm is a good signal (full level on the indicator).
• 📵 -70...-90 dBm – medium (possible call breaks).
• 🚫 -90...-110 dBm is weak (the Internet is almost not working).
• ❌ Below. -110 dBm - no network is available.

If your score is worse -90 dBm in a room where previously the connection was stable, the problem needs to be solved.

Also in the engineering menu, check:

• 🔄 Network mode (Set preferred network type) LTE The phone will not switch to the 3G weakly 4G.
• 📡 Operator – sometimes the smartphone “sticks” on a weak tower instead of a more powerful one.

⚠️ Note: If the engineering menu displays Unknown instead of network data, it may indicate a hardware malfunction of the communication module.

2. Optimization of network settings in MIUI

MIUI Manual settings can significantly improve signal performance, especially on Redmi models. 9/10 POCO X3, where energy saving algorithms aggressively restrict communication.

Follow this checklist:

Select a regime "4G/3G/2G (Auto" in Settings → SIM-maps and mobile networks → Network mode|

Turn off Volte if calls are interrupted|

Activate “Enhanced mode” 4G" (If there is one in your model)|

Disable "Traffic Savings" in Settings → Battery and productivity|

Reset network settings to factory (Settings) → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth)

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Pay special attention to the settings SIM-map:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-Map and check the access point (APN).
3. If APN reset (for example, after updating), enter your operator's settings manually. For MTS, Beeline, Megaphone and Tele2, the current settings can be found on the official websites.

Some Xiaomi firmware has a hidden option Enable 4G+, which is a forced frequency aggregation to increase speed and stability:

1. From the Engineering Menu (#4636##) select Phone Information.
2. Scroll to Set Preferred Network Type and select LTE/TD-SCDMA/GSM/WCDMA (for China or LTE/GSM/WCDMA (for global versions).
3. Save the settings and restart the phone.

⚠️ Note: On Xiaomi models with two SIM-For example, the Redmi Note 11 Pro+) A weak signal on one of them could be caused by a frequency conflict. SIM-map in settings and check for changes.

MTS|

Beeline |

MegaFon |

Tele2.|

Yota|

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3. Programming methods of signal amplification

If the hardware settings didn't work, try specialized applications that don't magically amplify the signal, but they help optimize the connection and avoid switching to weak towers.

Top.-3 Verified utilities for Xiaomi:

• 📱 Network Signal Speed Booster — analyzes the nearest towers and suggests the optimal network configuration. MIUI 12-14.
• 🔍 NetMonster – shows detailed information about the cells (including the distance to the tower) and helps you manually choose the best cell.
• 🛡️ 4G LTE Switch – Forcibly blocking switching to 3G/2G, if you only need 4G.

Instructions for using NetMonster (the most effective tool):

1. Download the app from Google Play (or APKPure if it’s not available in your area).
2. Run the scan - the program will show all available towers with an indication of signal level and frequency.
3. If there is a tower with a stronger signal nearby, but the phone does not connect to it, try manually selecting it in the Network operators settings.

For advanced users, if your Xiaomi supports band locking, you can manually specify the optimal range. For example, for Megaphone in Moscow it is better to work on Band 3 (1800 MHz), and for MTS – Band 7 (2600 MHz). MTK Engineering Mode (for MediaTek processors) or Qualcomm QXDM (for Snapdragon).

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If after installing the applications to amplify the signal, the phone becomes more quickly discharged, turn off the background activity of these programs in the battery settings. They should only work when the network is actively used.

Hardware solutions: from repeaters to external antennas

If the software methods have failed, it's time to look at external devices, which are more expensive but more effective, especially in remote areas or in buildings with thick walls.

Options for hardware signal amplification:

For most Xiaomi users, a repeater would be the best solution, picking up a weak signal from the outside and relaying it indoors.

• 📶 Support your operator’s frequencies (for example, for 4G MTS needs 1800 and 2600 MHz).
• 🏠 Coverage area - for the apartment will be enough model for 100-200 m².
• 🔌 Type of connection – some repeaters require a connection to the router.

Popular models of repeaters for Xiaomi:

• 🔹 Huawei B315 — universal 4G-repeater with support of all Russian operators.
• 🔹 TP-Link TL-SignalBooster – budget option for strengthening 3G/4G.
• 🔹 Netgear LB1120 — Premium solution with automatic selection of the best tower.

If you're not willing to spend money on a repeater, try an external antenna with a magnetic attachment, which you can attach to a window frame or a balcony and connect to your phone through an adapter. SMA or TS-9 (Check compatibility with your model!).

⚠️ Note: Before buying a repeater or antenna, ask the operator what frequencies it uses in your area. For example, in rural areas, Tele2 can operate at 900 MHz, and a repeater with only 1800 MHz support will be useless.

5. Alternative methods: from flashing to replacement SIM-map

Sometimes the signal goes missing because of software glitches or outdated components.

🔄 Resetting network settings:

1. Go to Settings → System → Resetting settings.
2. Select Reset Wi-Fi, Mobile Network and Bluetooth settings.
3. After restarting, the phone will re-detect the available networks.

📱 Replacement SIM-map:

• Old ones. SIM-Cards (especially Mini-SIM) may not be in good contact with the slot.
• Replace it with Nano-SIM in the cabin operator – it is free.
• If you use eSIM, check its profile in settings (Settings) → SIM-map → eSIM).

🛠️ Reflashing to the global version MIUI:

🔋 Verification of the communication module:

If all the methods don't work, the communication module itself may be faulty.

1. Put it in. SIM-card to another phone – if the signal is normal, the problem is your Xiaomi.
2. See if the battery is swollen - it can press on the antenna block.
3. If the phone fell or got wet, contact the service - perhaps the antenna contacts have gone away.

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Before visiting the service center, back up the data. Diagnostics of the communication module may require a complete reset of the phone.

6. How to amplify the signal without money: life hacks for emergencies

If you urgently need an Internet or a call, and there is no repeater at hand, use these tricks:

📶 Positioning of the phone:

• Keep your phone close to the window, and the walls weaken the signal by 10 to 30 dBm.
• Do not place the device on metal surfaces (for example, a refrigerator).
• In the car, use a tripod on the windshield - the car body screens the signal.

🔄 Airplane mode:

1. Activate the aircraft mode for 10-15 seconds.
2. Turn it off – the phone will scan the networks again and can connect to a more powerful tower.

📡 Using Wi-Fi for calls:

• Enable Wi-Fi Calling in Settings SIM-Cards (if supported by the operator).
• Calls will go over the internet even if the cellular network is weak.
• Suitable for MTS, MegaFon and Beeline (on Tele2 works not everywhere).

🔋 Battery savings:

When the signal is weak, the phone uses a lot of energy to find the network, to prolong the autonomy.

• Turn off Network Auto Search in Settings SIM-map.
• Set a background traffic limit for applications.
• Use Battery Savings mode, but exclude messengers from optimization.

7.Frequent Errors That Deter the Signal on Xiaomi

Many users themselves weaken the signal without even knowing it.

❌ We use metal covers to shield the antenna, and magnetic fasteners are especially dangerous.

❌ Disabling mobile data to save traffic – the phone stops scanning 4G-net and sticks to 2G.

❌ Install custom firmware without support for the desired frequencies – for example, LineageOS may not have drivers for Russian operators.

❌ Ignoring updates MIUI — In new versions, bugs with the communication module are often corrected (for example, in the MIUI 14 improved the switching algorithm between 4G and 5G).

❌ Use of the two SIM-without needing cards – the second module causes interference, especially if one of the SIM idle.

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If the signal has not improved after all the manipulations, check the coverage of your operator on the map (for example, on the MTS website or MegaFon), perhaps the problem is not the phone, but the lack of towers in your area.

FAQ: Answers to Frequent Questions