How to make communication on the Xiaomi phone more stable: from settings to hardware solutions

Weak network signal, call interruptions or slow mobile Internet on Xiaomi – a problem that even owners of flagship models like Xiaomi 14 Ultra or Xiaomi have to face. POCO F6 Pro. Causes can be covered as in software failures MIUI, And so it's in hardware constraints of budget smartphones, but in 90 percent of cases, you can fix it without going to the service center.

In this article, we will discuss all possible ways to improve communication – from basic settings to little-known functions. MIUI, You'll learn how to choose the right mode of the network, why VoLTE sometimes worsens the quality of calls, and what to do if the phone "can't see" the tower. 5G. For owners of older models (Redmi Note 8 Pro, Mi, etc.) 9T) We will give some recommendations for optimizing work with modern networks.

We will pay special attention to hardware nuances: for example, why a metal case POCO X6 Pro can block the signal, or as incorrectly installed SIM-At the end of this article, a quick checklist and answers to frequent questions, including eSIM and roaming issues.

All instructions tested on current versions MIUI 14/15 (including global and Chinese firmware) and adapted to models 2020–2026 If your Xiaomi Released is up to 2019 In the past, some of the items may not work, starting with MIUI 12.5, The company has removed support for outdated communication standards (for example, 3G in some regions).

1. Checking the baseline parameters: SIM-map and network mode

Before you dig deep into the settings, make sure that the problem isn't on the surface. Let's start with a physical check. SIM-maps -- even microscopic shifting of contacts can cause signal loss. Remove the tray, inspect the map for scratches or contaminants. If you use a nano-SIM adapter, make sure it fits tightly to your phone's contacts.

Next, we go to network settings. → SIM-maps and mobile networks → [choose SIM] → Type of network.

It is important to choose the best mode depending on your operator and phone model:

• 📶 4G (preferably, it's a universal option for most regions. If you choose this, the phone will automatically switch to the phone. 3G/2G low-signal.
• 🌐 5G — It is only relevant for flagships (Xiaomi) 13T, Redmi K60 Include if your operator supports 5G in your city.
• ⚠️ Only 3G or 2G — These modes should be chosen only in case of emergency (for example, to save charge in travel).
• ⚡ Automatically, not always optimal, as the phone can stick to a weak network instead of switching to a more stable one.

Note the Enable VoLTE (in the same settings) feature, which allows you to call via 4G, This improves the quality of communication, but sometimes conflicts with some operators (for example, Tele2 in certain regions). If after turning on VoLTE calls start to stop, turn off it and restart the phone.

⚠️ Note: On some models (Redmi Note 11, POCO M4 Pro after updating to MIUI 14 resets the network settings. If the connection is suddenly lost, check if the phone has switched to the only one. 2G.

2. Optimization of settings MIUI stable-connection

MIUI It hides a few useful features that can affect the quality of communication, the first of which is High Performance Network Mode:

1. Go to Settings. → The phone.
2. Tap 5-7 times on the MIUI version until the notification “You became a developer” appears.
3. Return to the main settings menu, open Additional → Developer options.
4. Find High Network Performance Mode and turn it on.

This option makes the phone scan more widely available networks and switch between towers faster, but it increases battery consumption by 5 to 10 percent, so turn it on only when needed.

The second hidden setting is manual network selection, which is useful if the phone gets stuck on a weak tower. → SIM-maps and mobile networks → [choose SIM] → Choice of network → Manually.

After scanning, select the operator with the highest signal level (even if it’s not your primary carrier – sometimes roaming networks are more stable).

The third function is the double function. 4G (two-model SIM-It allows both cards to work in the 4G-Simultaneously but shuts down 5G basic SIM. Activated in: Settings → SIM-maps and mobile networks → Double. 4G.

3. Software glitches: resetting settings and updates

If the connection disappears periodically (for example, after updating or installing applications), the problem can be hidden in the software conflict. Let's start with the safest method - reset network settings:

1. Settings → SIM-maps and mobile networks → Resetting network settings.
2. Confirm the action. The phone will reboot.

This method removes stored Wi-Fi networks and mobile internet settings, but does not affect personal data.

If the reset didn't help, try updating the firmware. Xiaomi regularly releases patches to fix modem problems. → The phone. → Updating the system.

Make sure you have the latest stable version installed (beta firmware may contain bugs).

For advanced users: if the problem appeared after the update, you can roll back to the previous version MIUI However, this is a risky procedure that can lead to data loss:

Another radical method is to completely reset to factory settings, and only use it if other methods have failed. → The phone. → Resetting settings → Erase all data.

⚠️ Note: On Redmi Note 12 and later, VoLTE may need to be re-activated via operator settings (e.g., sending a reset). USSD-Team #4636##).

4. Hardware causes of poor communication: antenna and body

If the software methods didn't help, the problem could be in the hardware.Modern Xiaomi smartphones (especially with a metal body like the one in the box). POCO F5 The metal blocks the waves, so hold the phone so that the antenna (usually located at the top of the back panel) does not close with your hand.

Another common problem is damage to the antenna cable.

• 📉 Signal disappears when the phone is tilted.
• 🔄 Frequent switching between 4G and 3G.
• 📵 Complete lack of network in places where previously there was a connection.

If you see any of these signs, go to the service center. Self-repair antenna requires disassembly of the phone and special equipment.

Check the tray, too. SIM-The Redmi 10 and the Redmi 10. POCO X3 Plastic trays crack over time, which leads to poor contact. Replace the tray with the original one (cost about 200-300 rubles).

For owners of phones with support for eSIM (Xiaomi 13 Lite, Redmi) K50i): If the connection is unstable, try to switch to physical. SIM-Some operators (e.g. MegaFon) are still optimizing their eSIM, which can cause disruptions.

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If you're in a bad signal area often (metro, basements), turn on Airplane Mode for 10 to 15 seconds, then turn it off. This will cause the phone to re-scan the networks.

5. Additional devices for signal amplification

If you live in a low-cost area, software techniques may not help, and then you should consider the external solutions.

To connect an external antenna to Xiaomi will need an adapter with a connector CRC9 (for most models; or TS9 (Make sure your model supports external antennas, such as, POCO M5s Redmi Note 11 Pro+ have a corresponding connector under the back cover.

When choosing a repeater, pay attention to the supported frequencies. 4G:

• 📡 Band 3 (1800 MHz) is the most common band.
• 📡 Band 7 (2600 MHz) – used in cities.
• 📡 Band 20 (800 MHz) – for remote regions.

Check with the operator what frequencies are used in your area.

⚠️ Note: The use of signal amplifiers without a license is prohibited in some countries (for example, Belarus).In Russia, it is allowed, but the power of the device must not exceed 100 mW.

6.Problems with specific Xiaomi models

Some Xiaomi phones have unique communication issues related to hardware or firmware.

Redmi Note 10 / POCO M3 Pro:

These models are powered by MediaTek Helio processor G95/G96 Suffer from a bug with constant switching between 4G and 3G. Decision:

• 🔧 Turn off automatic network selection and manually select 4G.
• 🔧 Update the firmware to MIUI 13.0.4+ (In earlier versions, the bug has not been fixed).

Xiaomi 12/12 Pro:

Problems with 5G These models are often associated with overheating of the modem. If the connection is lost when you have high load (games, video calls), try it:

• 🧊 Limit productivity in settings → Battery → Performance mode.
• 🔄 Shut down. 5G use 4G+ (network-setting).

POCO F4 / F5:

These phones sometimes don't run VoLTE after the upgrade.Solution:

1. Enter the dialer code: ##86583##.
2. In the menu that opens, select VoLTE Provisioning.
3. Reboot the phone.

Redmi 9A / 9C:

Budget models often lose touch due to a weak modem. If other methods don't work, try:

• 📴 Use only one. SIM-map (second disabled).
• 🔋 Turn off battery savings for the Phone app.

Check your physical condition. SIM-card-tray

Update the firmware to the latest version

Reset the network settings

Try to manually select an operator

Turn off VoLTE if calls are cut off

Check your phone for overheating (especially when using it) 5G)-->

7. Alternative methods of communication: Wi-Fi Calling and instant messengers

If mobile is consistently poor but Wi-Fi is available, use Wi-Fi Calling, a feature available on most Xiaomi models (starting with Wi-Fi Calling). MIUI 12) and is supported by MTS, Beeline, MegaFon:

1. Settings → SIM-maps and mobile networks → [choose SIM] → Wi-Fi Calling.
2. Activate the switch and follow operator instructions (sending may be required) USSD-team).

The advantages of Wi-Fi Calling:

• 📞 Call quality is better than on a regular network.
• 🌍 Works abroad without roaming (if connected to Wi-Fi).
• 🔋 Less battery consumption than regular calls.

Disadvantages:

• 🚫 It does not work without a Wi-Fi connection.
• 🛑 It may not be supported on older models (Redmi 8 and earlier).

The alternative is call-enabled messaging apps (WhatsApp, Telegram, Viber), which use the Internet to transmit voice, which is sometimes more reliable than mobile communications.

• 🔊 Quality depends on the speed of the Internet.
• 📱 Calls via messengers do not fall into the phone call log.

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Wi-Fi Calling is the best solution for areas with poor coverage, but requires support from the operator and phone model.

FAQ: Frequent questions about communication on Xiaomi