How to make a stable Internet on Xiaomi: from setting up Wi-Fi to changing DNS

Internet problems on Xiaomi smartphones are one of the most common complaints of users: the connection suddenly disappears, the speed drops to zero, the ping in online games is over 500 ms. from banal errors in router settings to software bugs in firmware MIUI. But the good news is that in 90% of cases, network stability can be restored without going to a service center.

In this article, we will discuss 7 proven ways to return a stable Internet to Redmi, POCO Mi – from basic actions like rebooting a router to advanced tricks with change MTU and tuning IPv6. We will pay special attention to the typical mistakes that users make when diagnosing, and explain why some “people’s” advice (for example, turning off Wi-Fi Assist) can only make the situation worse.

Before you start setting up, make sure that the problem is in the smartphone. Try connecting another device (laptop, tablet) to the same network and check the stability of the connection. If the breaks occur there, the router or provider is to blame, and further manipulation of the smartphone will not help.

1. Diagnostics of the problem: how to determine the source of an unstable Internet

The first step is to identify exactly what causes the cliffs or slow speeds, and it takes just 5 minutes and a couple of free apps.

Download NetMon or PingTools from Google Play, and they'll show you:

• 📶 Wi-Fi signal level in dBm (norm: from -30 before -60 dBm; critical value: below -80 dB).
• ⚡ Real-time download/return speed (compare with provider tariff).
• 🔄 Frequency of connection breaks (log of events).
• 🌐 DNS-delays (if ping to 8.8.8.8 is low and to sites is high, the problem is in the DNS).

Typical symptoms and their causes:

If you see frequent network reconnections in NetMon logs, and the signal is weaker -70 dBm is probably a problem with the physical distance to the router or interference from other devices, in which case changing the Wi-Fi channel or buying a repeater will help.

⚠️ Warning: Don't confuse "no internet" with "no connection": If there's an exclamation point next to a Wi-Fi icon and the status says "Connected, no internet" - the router or provider is to blame. If the icon is gray, the smartphone can not connect to the network at all (a problem in the Wi-Fi module or security settings).

2. Optimization of Wi-Fi settings on Xiaomi: hidden options MIUI

MIUI It hides a number of important Wi-Fi settings in the developer or deep in the menu, and adjusting them can significantly improve stability.

Open the Settings. → Wi-Fi, tap your network name and select Change Network. Here are key options available:

• 🔒 Type of security: If used WPA3, Try switching to WPA2-PSK (Some Xiaomi models are not working well. WPA3).
• 📡 Frequency Range: Forced to choose 5GHz (if the router supports) – there is less interference, but worse passage through walls.
• 🔄 Proxy: No, no, no, no, no, no, no, no, no, no, no, no. If you're manual, reset your network settings.
• 📱 Advanced Settings: Activate “Connect Automatically” and disable “Avoid Bad Connections».

To access hidden parameters:

1. Activate Developer Mode: Settings → About Phone → MIUI version (shap 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find Aggressive Wi-Fi switch to mobile data and turn it off.
4. Turn off Wi-Fi Assist (it automatically switches to mobile internet when a weak signal is present, which can cause lags).

Developer mode activated|Aggressive switching to mobile data is disabled|Selected fixed range (2.4 or 5 GHz)|Proxy server disabled|Type of security — WPA2-PSK-->

If the connection is still unstable after these manipulations, try resetting the network settings to factory settings: → System system → Resetting settings → Resetting Wi-Fi, Mobile Data and Bluetooth.

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After resetting the network, the smartphone will “forget” all saved Wi-Fi passwords. Write them down in advance or take screenshots QR-codes.

3. Set up the router for maximum compatibility with Xiaomi

Often the problem lies not in the smartphone, but in the wrong settings of the router, especially for low-cost models from providers (for example, Rostelecom or Beeline), where the default enabled “optimizations” that prevent stable operation.

Go to the router control panel (usually at 192.168.1.1 or 192.168.0.1) and check the following settings:

• 📶 Wi-Fi Channel: Manually select a channel with minimal load (use the WiFi Analyzer app for analysis.
• 🔄 Mode of operation: Install 802.11n (If you have an old smartphone, or 802.11ac (for new models. Mode 802.11ax (Wi-Fi 6 may be unstable on some firmware MIUI.
• 🔒 Channel width: For 2.4 GHz, choose 20 MHz, for 5 GHz, 40 MHz or 80 MHz (if the router supports).
• 🔗 MTU: Try to reduce the value from 1500 to 1472 (this helps with cliffs on some providers).

Also, disable the following options (if you have them on your router):

• ❌ Band Steering (Automatic Switching Between 2.4 and 5 GHz).
• ❌ Mu-MIMO (may conflict with some Qualcomm chipsets in Xiaomi).
• ❌ Fast Roaming (802.11r) (causes frequent breaks in the compound).

Router from the provider (Rostelecom, Beeline, etc.)|TP-Link|Xiaomi Mi Router|ASUS|Another brand|I don't know.-->

If stability has not improved after the changes, try rolling back the router firmware to an older version. 4A Firmware newer than 2.18.0 are often encountered bugs with DHCP.

4. Shift DNS: Why it is important and how to choose the best server

Wrong settings DNS They can cause delays in opening websites, connection breaks, and even blocking access to certain services. DNS Providers who are often overloaded or operating unstablely.

To change the DNS:

1. Go to Settings → Connections → Private DNS.
2. Select “Host Name of Private Provider” DNS» Enter one of the addresses: dns.google (Google) DNS) 1dot1dot1dot1.cloudflare-dns.com (Cloudflare) dns.quad9.net (Quad9, Blocking malicious sites)

Click “Save” and restart your smartphone.

For more flexible settings, use the application DNS Changer (requires root or developer mode enabled) allows you to change the game:

• 🔄 Quickly switch between DNS-server.
• 📊 Test the speed of server responses.
• 🔒 Blocking Advertising at Level DNS (For example, through AdGuard. DNS).

Critical information: If after the change DNS Some websites (e.g., banking sites) have stopped opening, and some Russian ISPs are blocking access to third-party sites. DNS through deep-checking of packages (DPI).

5. Problems with the mobile Internet: 4G/5G break off

If the instability is only observed on the mobile network (4G/5G), The reasons may be in the settings of the smartphone, and in the work of the operator:

Check the following parameters:

• 📶 Signal Level: Enter in the dialer number ##4636##, Select "Phone Information." If Signal Strength is below -100 dBm, you're in the dead zone».
• 🔄 Network Mode: Go to Settings → SIM-maps and mobile networks → Network mode and select Only LTE (if 4G-Auto mode can cause frequent switching between 3G/4G.
• 📡 APN: Make sure that the access point (APN) It corresponds to your operator. For MTS it is Internet.mts.ru, for Beeline - Internet.beeline.ru.

If the signal is weak, but the network is still catching, try:

1. Disable VoLTE (voice through) LTE) customized SIM-Maps – sometimes it conflicts with data transfer.
2. Activate Flight Mode for 30 seconds, then disable (reset communication module).
3. Install Network Signal Guru for detailed cell analysis and forced connection to a more stable base.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 10 Pro) after upgrading to MIUI 14 there is a bug with the "hang" of the mobile Internet, in which case only the firmware rollback or reset to factory settings will help.

Advanced methods: change MTU, shutdown IPv6 and other tricks

If the basic methods didn't work, it's time to move to "heavy artillery," which takes a little more effort, but often solves problems that standard means can't solve.

Modification of the MTU (Maximum Transmission Unit)

Wrong value MTU This can cause packet fragmentation and connection breaks, and the optimal value for most networks is 1472 or 1480.

adb shell settings put global captive_portal_detection_enabled 0


adb shell settings put global captive_portal_server false




adb shell ifconfig wlan0 mtu 1472

These commands disable the provider’s portal check and install MTU For Wi-Fi, replace the mobile Internet. wlan0 on rmnet_data.

2. IPv6 disablement

Some providers (for example, Rostelecom) are incorrectly processed IPv6-traffic that causes it to freeze, to shut it down:

1. Go to Settings → Connections → Mobile Network → Access Point Name (APN).
2. Choose yours. APN And in the field, APN remove ipv6 (There should be only default, supl).
3. Save and restart your smartphone.

3. Forced use TCP instead QUIC

Protocol QUIC (It's used in Chrome and some apps, and it can conflict with some routers to turn it off:

• Open up. chrome://flags Chrome.
• Find the Experimental option QUIC protocol and select Disabled.

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Change of change MTU and off IPv6 — This is the final frontier of diagnostics, and if you've had this problem, it's very likely hardware, like a Wi-Fi module or antenna that's not working).

7. Hardware problems: when the "iron" is to blame

If none of the software methods worked, it could be that the problem is a physical malfunction of the smartphone.

• 📡 Damaged antenna. Wi-Fi/4G (often after falling or getting moisture).
• 🔌 Oxidation of contacts of the communication module (manifested as periodic breaks).
• 🔋 Power module malfunction (leads to voltage “sinks” and Wi-Fi failures).

How to diagnose a hardware problem:

1. Check your smartphone for physical damage (cracks near antenna lines, traces of corrosion under the lid).
2. Connect to Wi-Fi in an anechoic chamber (e.g., in an open space) if the signal is stable, the problem is interference, if not, the module.
3. Test the other one. SIM-If the mobile Internet is working, it's my fault. SIM slot.

If you suspect a hardware malfunction, contact the service center.

⚠️ Warning: If the smartphone was in water (even briefly), don't dry it with a hair dryer or on a battery! This will speed up the corrosion of the contacts.

FAQ: Answers to Frequent Questions