How to amplify the cellular signal on the Xiaomi phone: proven methods of 2026

Have you noticed that your Xiaomi has become worse at catching the network? You can only call at the window, and mobile Internet is lost and runs at dial-up speed? The problem of weak cellular signal is familiar to many owners of smartphones of this brand — especially in densely populated cities with dense buildings or on the outskirts where the towers of operators are located far away. In this article, we will analyze all the possible causes of poor reception and give 10 practical solutions that can be implemented with your own hands — without going to the service center and buying expensive amplifiers.

It's important to understand that weak signal is not always the fault of the phone. Most often, the problem lies in a combination of factors, from incorrect network settings to physical obstacles in the way of radio waves. We tested each method on different Xiaomi models (from the budget Redmi Note to the flagship Mi 13 Ultra) and selected only those that have real effects. Some solutions involve hidden MIUI features that most users do not even know about.

Before you go into action, check the basics: whether you have the mode on the plane, whether it is installed. SIM-If you're using a metal case, you're using a card that's curved in the tray, and if you're using a metal case, they're shielding the signal, if you're okay, we'll start diagnosing and fixing the problem.

1. Checking the current signal level: how to tell how bad everything is

Before you fix anything, you have to make an objective assessment of the situation. Android has hidden engineering menus that show the exact network parameters -- not just the number of sticks on the screen, but the actual signal strength in decibels (dBm), the cell information, and even the distance to the base station. Here's how to get there:

Open the phone application and enter the combination:

##4636##

In the menu that appears, select Phone Information (or Phone Information).

• 📶 Signal strength - value in dBm. Norm: from -70 before -90. Bad: below -100. Critical: below -110.
• 📡 Network type (Network type) – if necessary LTE, but the speed is like EDGE, The problem may be in the operator's settings.
• 🔄 Roaming – if true, you are connected to someone else’s tower (perhaps with worse coverage).
• 📍 Service state - must be in service, SIM-The card is not registered on the network.

If the signal is below -105 dBm, that explains your communication problems. Take a note of this data or take a picture of it, which will be useful for comparison after applying our recommendations. Also, pay attention to the Mobile network type field: if there is an unknown, this may indicate a software failure of the communication module.

⚠️ Warning: Don't confuse dBm with percentage! -85 dBm is better than -100 dBm (although the number is smaller) In decibels, the closer to zero, the stronger the signal.

2. Network settings optimization: what can be changed in MIUI

Xiaomi based on MIUI offers several hidden and non-obvious settings that can significantly improve signal reception, many users do not even know about their existence, as they are hidden deep in the menu or require activation through an engineering menu.

Start with the basic settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map and open the network type.
3. Install 4G (preferably) or 4G Only. If you have Xiaomi with 5G support (like Mi 11 or newer), try 5G/4G/3G/2G (auto).
4. Activate the option of Improved 4G coverage (if available in your model).

If these settings don’t help, move on to a deeper optimization:

• 🔧 Forced network selection, same menu. SIM-Maps and mobile networks find the choice of network → Manually, wait for the scan and select your carrier's network with the highest signal strength (even if it's not marked as "current"), which will help if the phone is clinging to a distant tower with a weak signal.
• 📶 Disabling VoLTE. Paradoxically, sometimes voice calls 4G (VoLTE) impairs communication stability. Try disabling this option in Settings SIM-map → VoLTE.
• 🔄 Reset network settings. Go to Settings → System system → Resetting settings → Resetting Wi-Fi, mobile network and Bluetooth settings, which will delete all stored networks and reset the connection settings to defaults.

If the signal improved after the reset, the problem was in the settings conflict (for example, after a firmware update or a change). SIM-If not, then we will proceed to the following methods.

Hardware Solutions: How to Physically Enhance Signal

If the software settings didn't work, maybe the problem lies in the hardware. Don't rush to carry the phone for repairs - many faults can be fixed yourself.

Let's start with the simplest:

• 📱 Verification SIM-Take out the tray, look at the contacts. SIM-oxidation or contamination cards. wipe them with a lasticle or alcohol. Make sure the tray is inserted before the click - a 1 mm insufficient tray can lead to poor contact.
• 🛠️ Replacement of the antenna plume. At Xiaomi, the signal is received by thin plumes that wear out over time or move away from the connectors. If you disassembled the phone or dropped it, it could be the reason. 10/11, POCO X3) stand 200-500 ruble and replaced for 10 minute.
• 📡 Use an external antenna. For stationary use (e.g., at home), you can connect a passive antenna via an adapter. This will require: SMA-Female adapter (suitable for most Xiaomi); Antenna with SMA-Male connector (buy on AliExpress for a fee). 300-800 soldering iron (to solder the adapter to the antenna contacts on the board).

⚠️ Attention: soldering requires experience! Bad soldering can damage the board. If you've never soldered microelectronics, you better consult a master.

To fix the problem temporarily (for example, on a trip), you can use a battery-powered signal amplifier. Devices like the Netgear M1 or Huawei E5788 create a 4G local network and relay the signal to the phone, which will not solve the problem of poor reception on the smartphone itself, but will ensure a stable Internet connection.

Extract and clean SIM-map|Check the density of the tray|Examine antenna plumes for damage|Testing the phone without a cover|Try another one. SIM-card (for example, from another operator)-->

4. Software tricks: engineering menu and hidden features

Xiaomi based on Qualcomm (most models except the Redmi Note 12 on MediaTek) have an extended engineering menu where you can manually adjust the parameters of the communication module. This is the most effective way to improve the signal, but it requires caution – incorrect settings can lead to a complete loss of the network.

To get to the engineering menu, enter the Phone in the application:

##36446337##

or

##4636##

(for new versions of MIUI)

In the Band Selection (or Network Selection) menu, you will see a list of supported frequencies (Bands), your task is to disable unnecessary bands, leaving only those that your operator uses in your region.

For example, if you are a MegaFon user, the engineering menu only ticks Band 7, Band 20 (for 4G), Band 1 (for 3G) and Band 3 (for 2G).

⚠️ Warning: After changes to the engineering menu, be sure to restart the phone. If the signal is completely lost, return all settings to a default state or reset the network.

5. Alternative methods: from re-firming to folk remedies

If standard methods don't work, it's time for non-obvious solutions, some of which may seem strange, but they do help in certain situations.

Method 1: Reflashing of the communication module.

Sometimes the signal problems arise from broken firmware files that control the modem, which is true if the bad reception appeared after the MIUI update.

1. Download the stock firmware for your model from the official Xiaomi website (Fastboot section).
2. Unpack the archive and find the non-hlos.bin file (this is the modem firmware).
3. Fastboot is a fastboot flash modem non-hlos.bin.
4. Reboot the phone.

Method 2: Use applications to amplify the signal.

There are utilities on Google Play that are supposed to be "amplifying the signal," and most of them are empty, but some of them actually work by optimizing the network connection.

• 📊 Network Signal Guru – Shows detailed information about the cell and allows you to manually connect to a specific tower.
• 🔄 4G LTE Switch – Forced to switch between phones 2G/3G/4G, This can sometimes help you to switch to a more stable network.
• 📡 NetMonster – displays all available towers and their settings (requires root).

Important: No application can physically amplify the signal, it only helps to optimize the connection. If the problem is in the hardware (for example, a broken plume), the programs are useless.

Method 3: Folk remedies.

There's a myth going around that if you wrap your phone in foil, it's going to get a better signal. It's not true -- foil, on the contrary, is shielding radio waves. But there are two life hacks that work.

• 📦 The antennas in Xiaomi are usually located at the bottom of the case. Hold the phone vertically (not horizontally) and do not cover the bottom edge with your fingers.
• 🏠 Place your phone by the window on the windowsill, the signal will improve. 10-30% Due to the absence of obstacles (walls, furniture).

💡

If you often lose your network in the same place (for example, at work), try using Wi-Fi Calling.This feature allows you to call over the Internet even if there is no cellular signal. → SIM-maps and mobile networks → Additionally. → Wi-Fi Calling.

6.Extreme measures: when it's time to bring your phone to service

If you've tried all the methods, but the signal is still at -110 dBm, or the phone is not catching the network at all, the problem is likely hardware.

• 🔌 The phone can't see. SIM-Card (writes "No Service" or "Put In" SIM").
• 📵 The signal disappears even in places with good coverage (for example, on a street in the city center).
• 🔥 The phone overheats in the antenna area (upper left corner) – this may indicate a short circuit in the communication module.
• 🛠️ After falling or getting moisture, problems with the network appeared.

In these cases, the following malfunctions are possible:

If the phone is warranty, do not disassemble it yourself - contact the official service center Xiaomi. Otherwise, look for a proven master with good reviews. The average cost of diagnosis is 300-500 rubles, so do not save at this stage.

⚠️ Note: If the master suggests "sweep" IMEI" Or "restore the serial number" for 500 rubles, get away from it — IMEI It's only sent through official channels (and it's not always legal). IMEI It can block the phone on the network.

💡

Before visiting the service, make a backup of the data! when repairing the communication module, a complete phone reset is sometimes required.

FAQ: Answers to Frequent Questions