How to strengthen the Internet on Xiaomi phone: from settings to hardware solutions

Weak mobile Internet or Wi-Fi signals on Xiaomi smartphones are one of the most common problems faced by Redmi, Poco and Mi users. Whether the phone “can’t see” the network in the basement, or download speeds drop to dial-up values, or communication is constantly interrupted. The reasons can be either software (incorrect settings, outdated software) or hardware (bad communication module, damaged antenna). In this article, we will examine all possible ways to enhance the Internet, from basic settings to radical solutions like replacing an antenna or using an external card.

It is important to understand that there is no universal solution. The effectiveness of each method depends on the model of the phone (for example, Xiaomi). 12T Pro and Redmi Note 10 have different communication modules, operator (MTS and Tele2 have different frequencies). 4G), And we also tested the methods on the devices that we used to use. MIUI 13-15 and HyperOS, but most tips are relevant for older versions as well.

If you're willing to spend 10 to 15 minutes setting up, 90 percent of the problems will be solved without going to the service center, and we'll start with the simplest of ways, and we'll gradually move on to the more complex ones.

1. Check the basic network settings

Before you dig deeper, make sure that the problem is not with the basic settings, and users often turn off key settings without even knowing it.

Open the Settings. → SIM-Maps and mobile networks and check:

• 📶 Network mode: must be selected 4G/5G (If only it is recommended. 3G or 2G, speed will be limited.
• 🔄 Automatic network selection: turn on this option if it is disabled. Manually selected network may perform worse.
• 📡 Access point (APN): Click on your operator’s name and make sure the settings are APN correspond to current (they can be found on the MTS website, Beeline, etc.).
• 🔋 Traffic savings: in some firmware MIUI There is an option to limit background traffic – disable it.

If you use two of them SIM-In some Xiaomi models (for example, Redmi Note 11 Pro)+) main slot (usually) SIM (1) supports higher speeds 5G, supplementary.

⚠️ Note: On HyperOS phones, the path to network settings may be different.Look for Mobile Network or Data Transfer.

2. Software update and reset network settings

Often, the weak signal is associated with software bugs that are fixed in new firmware versions. For example, in the Redmi Note 10 Pro, there was a problem with the Qualcomm module. X51, cliff-driven 4G — she was eliminated in MIUI 13.0.4.

How to update software:

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version.
3. If the update doesn’t come, try downloading it manually through Xiaomi’s official website (select Russia or Global region).

If the update doesn’t help, reset your network settings:

1. Open the Settings. → Memory. → Resetting settings (or Settings) → Additionally. → Reset).
2. Select Network Reset (not to be confused with a full reset!).
3. After restarting, the phone will reconnect to networks with factory parameters.

⚠️ Warning: Network reset will delete all stored Wi-Fi passwords and Bluetooth settings.

3. Optimization of the work with SIM-card

The quality of communication depends largely on SIM-And that's what you can do:

• 🔄 Reinstall. SIM-map: remove it, wipe the contacts with dry cloth (no alcohol!) and insert it back in. Sometimes oxidation of the contacts leads to a bad signal.
• 🆕 Replace. SIM Nano-SIM or eSIM: Older Micro-SIM or Mini-SIM cards may not communicate well on adapters.
• 📶 Check Frequency Support: If Your Xiaomi Does Not Support Frequency 4G/5G If you're on your operator, the signal will be weak. 9A It doesn't work with Band. 7 (2600 MHz at the Body2.

How to find the supported frequencies of your phone:

1. Find the model on the GSMArena website.
2. In the Network section, see the supported LTE and 5G ranges.
3. Compare it to your operator’s frequencies (there is information on their official websites).

If your phone doesn’t support key carrier frequencies, consider changing your device or buying an external modem.

4. setting the modem parameters (Engineer Mode)

Xiaomi has a hidden Engineer Mode menu where you can manually adjust the modem settings, which will help if the phone sticks on a weak base or doesn’t switch between the two. 4G and 3G.

How to open Engineer Mode:

1. Open the Phone app.
2. Enter the code ##4636##
3. Select Phone Information (or Phone Information).

In this menu, pay attention to:

• 📶 Set preferred network type: install LTE only (if maximum speed is required) or LTE/WCDMA Auto (for better stability).
• 🔄 Enable/disable LTE: if 4G It is not working well, try to turn it off and return to the 3G.
• 📡 Signal Strength: This shows the current signal level in dBm. Normal values: from -85 dBm (excellent) to -110 dBm (weakly).

⚠️ Note: Do not change the settings in the Band Selection sections or RF Configuration, if you don't understand what it means, if you don't set up the right settings, you can lose your network completely.

On some models (e.g. Poco) F3) The engineering menu is locked. In this case, use the app. MTK Engineering Mode (for MediaTek processors) or Qualcomm Engineer Mode (for Snapdragon).

5. Strengthening the Wi-Fi signal

If the internet problems only occur when connecting to Wi-Fi, check the following points:

• 📶 Router range: Modern Xiaomi supports 5GHz, which is less prone to interference.Switch to it in router settings.
• 🔒 Type of security: if the router is using an outdated router WEP or TKIP, change WPA2-PSK or WPA3.
• 📡 Wi-Fi: In densely populated areas, channels 1-6 are often congested. Use the Wi-Fi Analyzer app to find a free channel.
• 🔄 Router mode: if you have a dual-band router, turn on the mode 11ac (or AX Wi-Fi 6).

How to change the Wi-Fi settings on Xiaomi:

1. Go to Settings. → Wi-Fi.
2. Click on your network name and select Change Network.
3. Enable the option Additional settings and set:

If the Wi-Fi signal is weak in a particular room, try:

• 🔌 Use a Wi-Fi repeater (e.g. Xiaomi Mi Wi-Fi Repeater 2).
• 📡 Redirect router antennas vertically (for better coverage across floors).
• 🔄 Reboot the router (sometimes helps even with a strong signal).

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If your Xiaomi is permanently disconnected from Wi-Fi, try turning off the Smart Switch feature in the Wi-Fi settings. It may be erroneously transferring your phone to mobile data.

6. Hardware methods of signal amplification

If the software methods didn't work, the problem could be the hardware.

• 🛠️ Replacement of antenna module: in Xiaomi antennas are integrated into the back cover. If the phone fell or got wet, the contacts could oxidize.
• 📶 External antenna: for models with a connector under the antenna (for example, Xiaomi Mi Max 3) you can connect an external antenna with amplification +3-7 dBi Cost: from 500 rubles.
• 🔋 Replacement SIM-eSIM cards: virtual SIM Less prone to physical damage and better contact with the module. 12/13 series, Poco F4/F5.
• 📱 Using a second phone as a repeater: If you have an old smartphone, turn on the Access Point and connect the main Xiaomi to it.

How to check if you need to replace the antenna:

1. Call from your phone and turn it slowly to 360.°. If the signal is lost in a certain position, the antenna is the problem.
2. Check the signal level in Engineer Mode (see section below). 4). If the values jump from -70 dBm -120 dBm is a sign of poor contact.

⚠️ Warning: Don't try to disassemble your phone to check the antenna - Xiaomi uses fragile plumes that are easily damaged.

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If the signal has not improved after the antenna replacement, the problem may be in the modem itself (Qualcomm Snapdragon chip). X55/X60 In this case, you will need to replace the motherboard.

7. Alternative solutions: modems and Mesh-systems

If none of the methods worked, consider external devices to amplify the signal:

For owners of Xiaomi, a good option will be the Xiaomi Mi Router router 4G (about 5,000 ₽) Huawei B535 (10 000 ₽). They support them. SIM-cards and distribute Wi-Fi at speeds up to 300 Mbit / s.

How to choose a signal amplifier:

• Check your carrier’s frequency support (see the table in Section 3).
• Pay attention to the gain factor (optimally 60-70 dB).
• Choose models with internal and external antennas (for example, for home use, LTE-repeater GL-300M).

8.When to contact the service center

If you have tried all methods, but the problem remains, perhaps the communication module or motherboard is defective.

• 📵 The phone does not catch the network at all (even in areas with good coverage).
• 🔥 After falling or getting moisture, the signal disappeared or became unstable.
• 📡 In Engineer Mode, the signal level is always lower. -110 dBm.
• 🔄 The phone doesn't switch between 2G/3G/4G Or is it constantly “hanging” on E (Edge).

Average prices for repairs in service centers (2026):

• Diagnosis: 500–1,000 ₽.
• Replacement of antenna module: 1,500–3,000 ₽.
• Replacement of the communication module (modem): 3000-8000 ₽.
• Repair after moisture: 2,000–15,000 ₽ (depending on the damage).

Before the service visit:

1. Make a backup of the data (Settings → About Phone → Backup).
2. Check if the center has an official Xiaomi license (the list of partners on the mi.com website).
3. If the phone is warranty, do not open it yourself - this will cancel the warranty.

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In 80% of cases, the problem is solved software (settings, firmware, SIM-Only 20% are hardware malfunctions that require repair.

FAQ: Frequent questions