Badly catches the network on Xiaomi? 10 Proven ways to amplify the signal 4G/5G

Have you noticed that your Xiaomi has become worse at catching mobile networks? Calls are interrupted, the Internet slows down, and the signal level indicator shows 1-2 The problem of weak signal is relevant for most smartphones of the brand - from the budget Redmi Note to the flagship Xiaomi 14. The reasons can lie both in the software settings and in the hardware limitations of the device.

In this article, we will discuss all possible ways to improve the network signal on Xiaomi smartphones, POCO And Redmi, from basic settings to advanced techniques that service center engineers use, you'll learn how to choose the right operator, optimize modem settings, use hidden engineering menus, and even physically modify the phone's body for better reception. We will pay special attention to the problems with 5G On new models – many users are faced with the fact that the smartphone “sees” the network of the fifth generation, but can not connect to it stably.

Important: All methods tested on current firmware MIUI 14/15 If your phone is running on an older version, some menu items may be different — we'll show you alternative paths, and we won't be looking at exotic solutions like soldering antennas or firmware custom modems: we'll focus on safe and reversible ways to do this.

1. Checking the basic parameters of the network

Before you start complex manipulations, make sure that the problem is not the basic settings, and users often use a phone with suboptimal connection parameters for years without even knowing it.

The first thing you need to do is force the list of available networks to be updated.

1. Go to Settings. → SIM-maps and mobile networks
2. Choose yours. SIM-card (if there are several)
3. Tap on Network Operators (or Network Search)
4. Turn off automatic selection and wait for manual search to complete
5. Choose your operator manually (even if it is already marked)

If the signal hasn't improved after this procedure, check the network mode. Many Xiaomi smartphones are defaulting on the phone. 4G (preferably, but sometimes it is better to manually prioritize:

• 📶 Only 4G (LTE) — if 5G unstable in your area
• 📶 3G/4G/5G (Auto – for maximum coverage (but switching is possible)
• 📶 Only 3G — downtown 4G There's only "on paper"

Don’t forget about roaming – if you travel frequently, turn on the National Roaming option in your settings. SIM-This will help to avoid connection problems in border areas or when moving between regions of the same operator.

2. Optimization of modem settings through the engineering menu

Xiaomi smartphones have a hidden engineering menu where you can fine-tune the modem settings. This does not require root rights, but you need to change the values carefully - incorrect settings can lead to a complete loss of communication.

To get into the engineering menu:

1. Open the phone application
2. Enter the combination ##4636##
3. Select Phone Information (or Phone Information)

In this menu, pay attention to the following parameters:

Band Selection is especially useful, where you can manually specify the frequency ranges that work best in your region. For example, for MTS in Russia, bands 3 (1800 MHz), 7 (2600 MHz) and 20 (800 MHz) are optimal. You can find out the current frequencies of your operator on its official website or through applications like Network Cell Info Lite.

⚠️ Note: Do not change the parameters RF Band and Network Mode, if not sure what they mean, can cause the phone to stop seeing the network at all and require a complete reset of the device.

3. Physical methods of signal enhancement

Sometimes the problem is not software, but physical limitations. Xiaomi smartphone antennas are located at the bottom of the case, and their work can deteriorate due to:

• 📱 Covers with metal elements - create a screening
• 🔋 Discharged battery – at a charge level below 15%, the modem can reduce power
• 🏢 Dense building – concrete walls weaken the signal 20-30 dB
• 🚗 High speed movements – frequent reconnection between towers

The simplest solutions:

• 📲 Remove the case and check the difference in signal level (especially relevant for models with a metal body type Mi 11 Ultra)
• 🔄 Restart your phone – sometimes the modem “hangs” on a weak cell
• 📡 Move closer to the window or balcony – even 2-3 Meters can greatly affect the reception
• 🔋 Keep battery power above 30% – at low level, energy saving limits modem operation

For owners. POCO F5, Redmi Note 12 Pro+ And other liquid-cooled models, you should also consider that overheating also degrades the signal.°C (can be checked in Settings) → The phone. → The modem automatically reduces the transmission power:

• 🧊 Let the phone cool down 10-15 minute
• 📵 Disable mobile data during intensive tasks (games, video editing)
• 🔄 Use performance modes in Settings → Battery

4. Update of firmware and modems

Outdated software is one of the main causes of poor signaling, and manufacturers regularly release updates that optimize modems, add support for new frequencies, and fix connection errors.

To check the relevance of the firmware:

1. Go to Settings → About the phone → System update
2. Click on the three dots in the top right corner and select Download the latest updates.
3. If you have an update, install it (preferably via Wi-Fi)

Pay special attention to modem updates. At Xiaomi, they often come separately from the main patches.

1. Open the engineering menu (#4636##)
2. Go to Phone Information
3. Check out the Baseband version and Modem version.
4. Compare it to the latest versions on the forums 4PDA or XDA Developers

If your version of the modem is outdated, but OTA-No updates, you can try manual installation via Fastboot or Recovery:

Download the current firmware for your model from the official website|Check the version. MIUI In Settings → The phone.|Make a backup copy of the data|Charge your phone to at least 60%|Prepare the cable. USB and the computer (for Fastboot)

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⚠️ Warning: Installing unofficial modems can lead to loss IMEI Use only files that are designed for your model and region (Global, EEA, China).

For supported models 5G (Xiaomi 12T, POCO F4 GT, Redmi K50 It is especially important to keep an eye on updates, and many users complain that after major updates, the updates are not available. MIUI 5G It stops working stably, and it helps:

• 🔄 Resetting network settings (Settings) → SIM-map → Resetting mobile network settings)
• 📱 Flashing through Mi Flash Tool with Clean All option
• 🔧 Manual indication of ranges 5G in the Engineering Menu (bands) n1, n3, n7, n28, n78 for Russia)

5. Use of third-party monitoring applications

To understand exactly what the communication problem is, you need diagnostic tools. MIUI They only show the signal level in the sticks, which doesn't give you the full picture:

How to interpret the evidence:

• 📶 -50 dBm -70 dBm is a great signal.
• 📶 -70 dBm -90 dBm - medium (interference possible)
• 📶 -90 dBm -110 dBm - weak (calls may be interrupted)
• 📶 below -110 dBm - practically no communication

If the app shows that the phone is connected to a distant tower (distance) >5 km) or uses a suboptimal range (e.g. Band 20 instead of Band 3), try:

• 🔄 Forced to reconnect to the network (airplane mode for 30 seconds)
• 📡 Manually block the problem range in the engineering menu
• 📱 Reboot the phone with the phone switched off SIM-card (and then insert it back in)

💡

In Network Cell Info Lite, turn on Notification, which will show the current signal strength in the status bar, so you can track changes in real time.

If all the cells in your area are showing a weak signal (< -100 dBm, the problem may be on the operator's side:

• 📞 Call for support and check if technical work is underway
• 🔄 Try it. SIM-map of another operator (for example, Tele2 often works better in the outback)
• 📡 Use an external antenna or repeater (more on this in the next section)

External signal amplification devices

If software methods have failed, and physical constraints (such as distance from a tower) have not been able to produce a stable signal, then hardware solutions are worth considering, and they are especially relevant for cottages, country houses or basement offices.

Options for external amplifiers:

For Xiaomi smartphones with support USB-OTG (Almost all models after 2018 can be used externally. LTE-An antenna modem, like Huawei. E3372 or ZTE MF833V. It's plugged in like this:

1. Put it in. SIM-modem
2. Connect the modem to the phone through OTG-cable
3. Turn it on. USB-Internet in modem settings
4. On your phone, select Settings. → Access Point and modem → USB-modem

If you chose a repeater, pay attention to the following points:

• 📡 Frequency bands – The device must support your operator’s bands
• 📶 Maximum gain factor – not less than 65 dB for suburban conditions
• 🏢 Coverage area - 100-200 m is enough for the house²
• 🔌 Type of power supply – some models require a constant connection to the socket

⚠️ Note: Installation of a repeater without the consent of the operator can be regarded as a violation of the license agreement. In Russia, it is legal to use only certified devices with a capacity of up to 100 mW. Before buying, check the requirements with your provider.

For owners of Xiaomi Mi Router or other routers of the brand, there is an interesting solution - connecting the phone to Wi-Fi Calling, which allows you to call and use mobile Internet over home Wi-Fi, even if the network signal is not available.

1. Go to Settings. → SIM-maps and mobile networks → Additionally. → Wi-Fi Calling
2. Turn on the option and follow the activation instructions (may require a call to the operator)
3. Make sure your router supports IMS (Most of the modern models are yes)

💡

Wi-Fi Calling works only with supported operators (in Russia - MTS, Beeline, MegaFon, Tele2). Calls via Wi-Fi are charged as usual, but do not consume a mobile Internet package.

7.Problems with specific Xiaomi models

Some Xiaomi smartphones have typical signal problems related to hardware features or firmware errors, and we have collected the most common cases and solutions for them.

For models with double SIM-Cards (Redmi Note 12 Pro)+, POCO F5) It's important to set priorities right. SIM Used only for calls, and the second for the Internet, do the following:

1. Go to Settings. → SIM-maps and mobile networks
2. Choose. SIM mobile data
3. In the section Voice calls indicate the preferred SIM
4. Turn off mobile data for the second SIM (if not used)

Xiaomi owners with eSIM support (Xiaomi 13 Lite, POCO F5 It is important to note that the virtual SIM It can conflict with the physical signal, if the signal disappears after activation of the eSIM:

• 🔄 Reboot the phone.
• 📱 Remove and Re-Activate the eSIM
• 📡 Check if the case is blocking the antenna (eSIM uses the same modules as the physical card)

Extreme measures: dumping and flashing

If none of these methods work, radical solutions remain, and they will take longer, but often the only way to get the signal back stable.

Resetting the network settings is the first step worth trying, and it removes all the stored connectivity settings, including cell data and settings. APN. How do you do it:

1. Go to Settings. → SIM-maps and mobile networks
2. Select Resetting of Mobile Network Settings
3. Confirm the action and restart the phone

If that doesn't work, the next step is to reset completely to factory settings.

Keep your contacts and SMS (For example, through Google Contacts)|Make a backup of photos and videos (Google Photos or MIUI Backup)|Write down account data (social networks, banks, mail)|Check if you know the passwords of Wi-Fi networks

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To perform the discharge:

1. Go to Settings → About the phone → Reset settings
2. Choose to erase all data
3. Enter your password (if set) and confirm
4. After restarting, set your phone as new.

If that doesn't solve the problem, it's still Fastboot, which will bring the phone back to "clean" but will require a computer and a cable. USB. Step-by-step instruction:

1. Download the official firmware for your model from the Xiaomi website
2. Unpack the archive and copy the path to the folder
3. Install the Mi Flash Tool on your computer
4. Turn off the phone and press Volume Down + Power to log in to Fastboot
5. Connect your phone to your PC and start the Mi Flash Tool
6. Select the downloaded firmware and press Flash
7. Wait for completion (5-10 minutes) and restart the device

⚠️ Attention: Fastboot flashing deletes all data, including files in internal memory. If you have Mi Account lock installed, you may need to log in after the procedure. Make sure you remember your login and password!

For models with a locked bootloader, you may need to unlock through the official Mi Unlock tool, which takes up to 72 hours (due to Xiaomi’s validation) and requires a tied Mi Account.

FAQ: Frequent questions about the network signal on Xiaomi