How to improve communication on Xiaomi Redmi: from settings to hardware solutions

Communication problems on Xiaomi Redmi smartphones are one of the most common complaints of users: mobile Internet is slowing down in areas with poor coverage, Wi-Fi is constantly shut down, Bluetooth can not find the device the first time, the causes of such failures are dozens of: from trivial errors in settings to hardware malfunctions of the antenna module, but the good news is that in 90% of cases, communication can be improved without going to the service center.

In this article, we will analyze all possible ways - from the basic (reboot, reset settings) to advanced (manual settings). APN, Firmware replacement, antenna checks. We will pay special attention to Redmi Note models. 10/11/12, Redmi 9/10 And the K-series flagships, because their hardware platform often requires a customized approach, if you're tired of call cliffs or the "eternal" E icon instead of the "eternal" one. 4G — read on.

1. Diagnosis of the problem: why is the connection bad?

Before trying "treatment", you need to make a "diagnosis." Bad communication on Xiaomi Redmi can manifest itself in different ways:

• 📶 Weak signal of the mobile network — 1-2 «Sticks” where other smartphones have full levels.
• 🌐 Wi-Fi is connected, but the speed is low or the connection is constantly broken.
• 🔗 Bluetooth does not find the device or communication is cut off after a few seconds.
• 📞 Calls are interrupted or the person hears you with a robot».

The reasons are software (settings, firmware, application conflicts) and hardware (antenna damage, contact oxidation, communication module defect). To avoid wasting time, start with a simple test:

⚠️ Attention: If after falling or getting moisture, the connection disappeared abruptly, do not try software methods. This is 99% hardware failure (antenna collapse or short circuit.

For mobile network diagnostics:

1. Go to Settings. → SIM-maps and mobile networks → Name of the access point (APN).
2. Check if the configuration matches the recommendations of your operator (on the site or in the Internet). SMS activated SIM).
3. Turn on Flight Mode for 30 seconds, then turn off - this will reset the connection to the tower.

To check the Wi-Fi:

• Connect to another network (such as a mobile access point).
• Run a speed test (for example, in the Speedtest app).
• Compare the results with other devices on the same network.

2. Basic settings: what to check first

Start with the basics – they help you 30-40% case:

• 🔄 Reboot your smartphone. Yeah, it's corny, but it often works. Hold the power button for 10 seconds until the switch menu comes up.
• 📱 Firmware update. Go to Settings. → The phone. → System updates. Outdated versions MIUI may contain bugs in the communication module.
• 📡 Manual network selection. In Settings → SIM-map → Select the network to disable Automatically and select the operator manually.
• 🔧 Reset network settings. Pathway: Settings → Memory and backup copies → Resetting settings → Resetting network settings.

Critical error of many users: ignoring regional settings SIM-If you are traveling or you have bought a smartphone abroad, the settings may indicate the wrong region. → Additionally. → Region (Select your country).

For Wi-Fi:

• 🔒 Make sure the router is running in mode. 802.11n/ac (not obsolete b/g).
• 📶 Switch Wi-Fi to a less busy channel (use the Wi-Fi Analyzer app).
• 🔄 Turn off the Smart Wi-Fi Switch function in the settings (it can break the connection).

3. Advanced mobile network settings

If the basic methods didn’t work, it’s time to dig deeper. Xiaomi Redmi smartphones have hidden settings that operators don’t advertise.

Setting up APN manually:

1. Go to Settings. → SIM-maps and mobile networks → Access points (APN).
2. Click Add and enter your operator’s settings (for example, for MTS:

Name: MTS


APN: internet.mts.ru




Proxy: Not specified




Port: Not specified




User name: mts




Password: mts




Type of authentication: PAP or CHAP




Type APN: default,supl

1. Save and select a new APN.

Forced selection of network standard:

In some regions, the smartphone can “stick” on the outdated 3G, though 4G It's available. It's to fix it:

1. Enter the dialer code ##4636##.
2. Select Phone Information.
3. In the Network Type Installation section, select LTE only (only) 4G).

⚠️ Note: If, after a forced choice, LTE If you lose the connection, you can return the setting to the car. 4G not yet deployed.

Shutdown VoLTE/VoWiFi (If you have problems with calls):

VoLTE technologies (voice on) 4G) And VoWiFi sometimes interferes with carrier networks to shut them down:

1. Go to Settings. → SIM-maps and mobile networks.
2. Turn off VoLTE and VoWiFi options (if any).
3. Reboot your smartphone.

4. Software solutions: firmware and applications

If the problem is in the software, it will help:

• 📲 Update MIUI Even if you have a "fresh" firmware, check for updates in Settings. → The phone. → Updating the system.
• 🔧 Installing custom firmware (like the Pixel Experience or LineageOS) is a radical method, but it often solves communication problems on older Redmi models.
• 🛠️ Clearing the cache of the communications module:

1. Go to Settings → Applications → Application Management.
2. Find phone services or SIM cards.
3. Press Warehouse. → Clear the cache.

To improve Wi-Fi:

• 📡 Use applications like Wi-Fi Analyzer to select the best channel.
• 🔒 Change the type of router security with WEP on WPA2/WPA3.
• 🔄 Turn off Bandsteering (2.4 GHz and 5 GHz) in router settings – it can cause conflicts.

Resetting to factory settings is a last resort, but sometimes necessary.

• Make a backup of the data (Settings) → Memory and backup copies → Backup).
• Remember or take pictures of the settings APN and Wi-Fi.
• Reset to Settings → About Phone → Reset settings.

💡

If the connection hasn’t improved after the reset, try flashing your smartphone through the Mi Flash Tool with a full clean (clean all) that will delete all data, but return the “clean” system.

Hardware methods: antenna and communication module

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

• 📡 Antenna contacts – oxidized or departed after falls.
• 🔌 SIM tray - if it bends, SIM-card is not in contact normally.
• 📱 Communication module – fails when overheating or short circuit.

How to check the antenna:

1. Remove the back cover (on removable battery models, such as Redmi) 4X or Redmi Note 5).
2. Check if the antenna’s gold contacts have moved away from the motherboard.
3. If the contacts are oxidized, gently clean them with a swallow or alcohol.

Replacement of the sim tray:

If the smartphone does not see SIM-card or communication disappears with a light press on the body:

1. Remove the tray and check if it will bend.
2. Try inserting the SIM into another slot (if there are two).
3. If the tray is damaged, replace it (worth it). 100-300 ruble).

⚠️ Note: On Redmi Note models 8/9/10 The antenna is integrated into the middle frame of the body, and if it's damaged, you'll need to replace the entire midframe, which is expensive to repair. 2000 ruble).

Verification of the communication module:

If the smartphone does not catch the network at all (even after resetting and flashing), the module may have burned down. RF (It's a radio frequency replacement. 1500-4000 depending on the model, to confirm the diagnosis:

• Check it out. IMEI (If it is null or does not match the box, the module is defective.
• Connect the other one. SIM-If the problem persists, it's the iron».

External signal amplification devices

If all methods are tried and the communication is still poor, external solutions remain:

• 📶 Signal repeater - suitable for home or office. Costs from 3000 rubles, installed next to the window.
• 📡 Directed antenna -- attached to the outside of the building and connected to the repeater. Effective in rural areas.
• 🔄 MIMO-antenna for Wi-Fi - replaces the regular antennas of the router, enhances the signal 20-50%.
• 📱 Case with antenna – for example, Xiaomi Mi Antenna Booster (suitable for Redmi Note) 9/10). It's amplifying the signal. 1-2 «sticks».

How to choose a repeater:

For Wi-Fi:

• If the router is far away, use a Mesh system (e.g. Xiaomi Mi Wi-Fi Mesh).
• If the speed drops over a long distance, install a repeater signal (from 1500 rubles).

💡

The mobile network signal repeater requires registration with Roskomnadzor (for Russia), illegal devices can be seized, and you face a fine of up to 50,000 rubles.

7. Frequent user errors

Many people make communication problems worse without even knowing it, and here are the most common mistakes.

• 🚫 Using left-hand firmware. Castom assemblies MIUI Unknown developers may contain broken drivers of the communication module.
• 🔋 Battery discharge below 15%. At low charge, the smartphone limits the signal power.
• 📲 Disabling background data for system applications could disrupt communications services.
• 📡 Use of the VPN Unnecessarily, some. VPN-Redirect traffic through slow servers.

How to avoid:

• Install firmware only from official sources (Xiaomi Community, 4PDA).
• Do not disable Mobile Data for Phone Services and Settings applications.
• Periodically (once a month) reset your network settings.

Another common problem is the conflict between the two. SIM-If you have a Redmi with two slots, try it:

1. Turn off one. SIM-map.
2. Change the cards (first) SIM sometimes priority).
3. Turn off Double Mode. 4G (if there is in the settings).

FAQ: Answers to Frequent Questions