Why Wi-Fi Won't Connect on a Xiaomi Redmi 8T: A Complete Diagnostic and Repair Guide

Owners Xiaomi Redmi 8T People often encounter a problem when their phone suddenly stops connecting to Wi-Fi—either the network disappears from the list, the password isn't accepted, or the connection keeps dropping. In 80% of cases, the culprit isn't hardware failure, but software glitches or incorrect settings. But how can you tell if it's a bug? MIUI Is it a faulty Wi-Fi module? And why does the problem sometimes return even after a factory reset?

This article isn't just a collection of standard advice like "reboot your router." We'll break it down. Redmi 8T-specific bugsrelated to its chipset Qualcomm Snapdragon 855, version MIUI 12/13/14, and even the nuances of working with dual-band routers. You'll learn how to check MAC address phone to block, why Redmi 8T may not see networks at 5 GHz, and what to do if Wi-Fi completely disappears from the settings after a software update.

For your convenience, we've divided the solutions into difficulty levels, from basic to advanced. If you're not a technical expert, start with the first section and move on. Experienced users can skip ahead to hardware diagnostic unit.

Top 5 Reasons Why Your Redmi 8T Won't Connect to Wi-Fi

Let's start with the most common problems, which can be solved in 2-3 minutes. Most often, the culprits are:

• 🔄 Router failure — especially if other devices are not connected to the network.
• 📱 Errors in phone settings - incorrect region, MAC restrictions, IP conflict.
• 🔒 MAC address blocking — the router may "forget" your Redmi 8T after the update.
• 📡 Wi-Fi channel incompatibility — the phone does not support some 5 GHz bands.
• 🔄 Conflict with VPN or firewall — MIUI aggressively blocks "suspicious" networks.

Before you dig deeper, do the following: basic check:

Make sure the Wi-Fi light on your router is on|Try connecting to the network from another device|Restart your phone and router|Check if Airplane Mode is enabled on your phone|Disable your VPN (if used)-->

If Wi-Fi works after these steps, the issue was temporary. If not, read on.

Router settings that break Wi-Fi on the Redmi 8T

About 30% of connection problems are rooted in the router configuration. Redmi 8T particularly sensitive to:

• 🔢 Encryption type - does not work with outdated ones WEP And TKIP.
• 📶 Channel width 5 GHz — at the value 80 MHz may lose connection.
• 🔄 MAC address filtering - if your phone is not on the white list.
• 🕒 Wi-Fi operating schedule — the router can turn off the network on a timer.

To check these parameters:

1. Open your router's control panel (usually at 192.168.0.1 or 192.168.1.1).
2. Go to the section Wi-Fi → Security Settings.
3. Make sure the encryption type is set WPA2-PSK or WPA3-PSK (but not mixed mode!).
4. For 5 GHz network, set the channel width 20/40 MHz (not 80!).

Another common problem is IP address conflict. If your Redmi 8T If the IP address is in a range already occupied by another device, the connection will be lost. To fix this:

1. Find the section in your router settings DHCP.
2. Increase the address pool (for example, with 192.168.1.100-200 to 192.168.1.100-250).
3. Or assign a static IP to your phone manually (in the Wi-Fi settings on your phone).

Hidden MIUI Bugs That Break Wi-Fi

MIUI — it's not just an Android shell, but a whole ecosystem with its own bugs. Redmi 8T most commonly encountered:

• 🔄 Wi-Fi module freezing after updating (especially from MIUI 12 to MIUI 13).
• 📱 Automatic connection to "junk" networks (For example, Xiaomi_XXXX from other people's devices).
• 🔒 Connection blocked due to "Safe Mode" (if enabled Network protection in the settings).
• 📡 Lack of support for some Wi-Fi 6 standards (despite the stated compatibility).

The first thing to do is reset network settings:

1. Go to Settings → System and device → Advanced → Reset settings.
2. Select Reset Wi-Fi, mobile network, and Bluetooth settings.
3. Confirm the action and restart your phone.

If this doesn't help, try Disable power saving for Wi-Fi:

1. Go to Settings → Battery & performance → Battery mode.
2. Select Performance (not "Balanced"!).
3. Enable the option High Wi-Fi performance (if any).

What should I do if Wi-Fi disappears from settings after a reset?

If after resetting the settings the "Wi-Fi" item disappears from the menu, this is a sign of a malfunction in the module. WCNSS_qcom_cfg.iniIn this case:

1. Install the application Mi Toolkit from MIUI Russia.

2. In the "Diagnostics" section, select "Restore network modules".

3. Restart your phone.

If this does not help, you will need to reflash the firmware via Fastboot.

Another hidden bug - conflict with Google servicesIf you have it disabled Google Play Services or if you have older versions, MIUI may block connections to some networks. Update services via Play Market or manually download the latest APK from APKMirror.

2.4GHz and 5GHz issues: Why the Redmi 8T can't see the network

Redmi 8T supports both frequencies, but with some nuances:

If your Redmi 8T does not see the 5 GHz network:

1. Check if 5 GHz support is enabled on your router (in the settings) Wi-Fi → Basic Settings).
2. Make sure your phone is in a strong reception area (5 GHz is worse at passing through walls).
3. Try manually specifying the 5 GHz channel in the range 36-48 (Channels 149-165 may not be supported).

If you have problems with 2.4 GHz:

• 📶 Change the channel on your router to 1, 6 or 11 (they intersect the least).
• 🔄 Turn off the feature Auto Channel Selection (auto channel selection).
• 📱 Turn off the option in your phone settings Avoid bad connections (V Wi-Fi Settings → Advanced).

MAC Address Blocking: How to Check and Fix

Many routers use filtering by MAC address — a unique device identifier. If your Redmi 8T If your device isn't whitelisted, it won't be able to connect, even if the password is correct. To check:

1. Find out your phone's MAC address:
   • Go to Settings → About phone → General information → Status.
   • Find the line Wi-Fi MAC address (For example, 00:11:22:33:44:55).

Go to the router settings section MAC address filtering.

Make sure your phone's address is on the list of allowed devices.

If the MAC address is missing, add it manually. If filtering is disabled but the problem persists, it might be the router. blocked your address due to frequent connection attempts. In this case:

1. Find the section in your router settings Blacklist or Blocking devices.
2. Remove your MAC address from there Redmi 8T.
3. Reboot your router.

One more thing: after updating MIUI The phone's MAC address may change. (especially if the function is enabled MAC randomization). To fix this:

1. Go to Settings → Wi-Fi → Advanced.
2. Disable the option Use a random MAC.
3. Reconnect to the network.

Hardware Problems: How to Test a Wi-Fi Module

If none of the software methods helped, the problem may be in hardware. IN Redmi 8T the module is responsible for Wi-Fi Qualcomm WCN3990, which may fail due to:

• 🔥 Overheating (if the phone was often used under high loads).
• 💧 Moisture ingress (even if there are no visible signs of corrosion).
• 🔌 Power surges when charging.
• 🛠️ Unsuccessful repairs (for example, after replacing the battery).

To check the hardware:

Check if Bluetooth is working (if not, the problem is in the general WCN3990 module) | Connect the phone to another router (for example, via a mobile hotspot) | Try connecting to Wi-Fi in Safe Mode (safe mode)|Check if the top of the phone is hot (the Wi-Fi module is located there)|Install the app WiFi Analyzer and check the signal level-->

If suspicions of hardware failure are confirmed, there are two options:

1. Reflashing the module through EDL mode (requires special equipment).
2. Replacing the Wi-Fi module (at the service center).

How to enter EDL mode on Redmi 8T?

Attention! Incorrect actions in EDL can brick your phone.

1. Turn off your phone.

2. Press and hold the buttons Volume Up + Volume Down + Power.

3. Connect your phone to your PC via USB.

4. If the drivers are installed, the Device Manager will show Qualcomm HS-USB QDLoader 9008.

To work with EDL you need Mi Flash Tool and firmware for your model.

Cost of replacing a Wi-Fi module Redmi 8T in 2026 is 1500-2500 rubles (Depending on the region). If the phone is under warranty, contact the official service center. Xiaomi - They are obliged to correct the defect free of charge.

MIUI updates and their impact on Wi-Fi

Many users have reported that they are experiencing problems with Wi-Fi Redmi 8T started after upgrading to MIUI 13/14Main complaints:

• 🔄 Constant connection breaks (every 5-10 minutes).
• 📱 Unable to connect to hidden networks.
• 🔒 Authentication error (despite the correct password).
• 📡 Wi-Fi disappears from settings.

If the problem appears after an update, try:

1. Roll back to the previous version of MIUI (through Fastboot).
2. Install custom firmware (For example, Pixel Experience or LineageOS).
3. Reset your phone to factory settings (make a backup first!).

To roll back to an older version of MIUI:

1. Download the required firmware from Xiaomi's official website.
2. Unzip the archive and place the folder in the root of your phone's memory.
3. Go to Settings → About phone → System update.
4. Click on the three dots in the upper right corner and select Select firmware file.
5. Specify the path to the downloaded file and confirm the installation.

If you don't want to take risks, you can try alternative solution - install a patch for Wi-Fi via Magisk (required) root rights). On the forum 4PDA There is a topic with modified drivers for Redmi 8T, which solve connection problems.

Frequently asked questions about Wi-Fi on the Redmi 8T

🔍 Why does my phone connect to Wi-Fi, but the internet doesn't work?

This is a typical problem when Redmi 8T receives an IP address but cannot access the network. Reasons:

• 🔄 Incorrect DNS settings - try specifying it manually 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).
• 📱 Blocking traffic with a router - check the settings Parent Control or Firewall.
• 🔒 Provider restrictions — some operators block access by MAC address.

To change DNS:

1. Tap and hold the name of your Wi-Fi network in Settings.
2. Select Change network → Show advanced options.
3. In the field IP settings select Static.
4. In the lines DNS 1 And DNS 2 please indicate 8.8.8.8 And 8.8.4.4.

📶 How to boost Wi-Fi signal on Redmi 8T?

If the network reception is poor, try:

• 📡 Change the channel on the router to a less busy one (use the app WiFi Analyzer).
• 🔄 Install a signal repeater (For example, Xiaomi Wi-Fi Repeater).
• 📱 Disable power saving for Wi-Fi (in battery settings).
• 🔒 Use an external antenna (if the router supports it).

You can also enable the option Always look for networks V Settings → Wi-Fi → Advanced.

⚡ Why did Wi-Fi disappear after replacing the battery?

This is a common problem—when replacing the battery, technicians often disconnect the Wi-Fi antenna cable. Solutions:

1. Disassemble the phone and check if the cable is connected to the motherboard (it comes from the top of the case).
2. If the cable is connected but the Wi-Fi isn't working, the contacts may be damaged. Rub them with rubbing alcohol and press them gently.
3. If the problem persists after disassembling, check whether the Wi-Fi module itself (located under the metal screen next to the camera) has been damaged.

Attention! Disassembling the phone yourself will void the warranty. If the phone is under warranty, contact a service center.

🔄 Can I use the Redmi 8T as a Wi-Fi repeater?

Yes, but with reservations. Redmi 8T does not support the official function Wi-Fi Repeater, but it is possible:

• 📱 Turn on the hotspot and connect another device to it (but this is not a repeater!).
• 🔄 Use applications like NetShare or PdaNet+ (root required).
• 📡 Install custom firmware with support Wi-Fi Tethering.

For a full signal repetition it is better to buy Wi-Fi Repeater (costs from 1000 rubles).

🛠️ Where can I find an original Wi-Fi module for the Redmi 8T?

The original module has markings WCN3990 (Qualcomm). You can buy it:

• 🛒 On AliExpress (search by request Redmi 8T WCN3990).
• 🔧 In service centers Xiaomi (they order spare parts from the official supplier).
• 📦 On forums (for example, 4PDA in the topic about Redmi 8T).

Price: 800-1500 rublesWhen replacing, make sure the technician uses the original module—Chinese-made equivalents often perform poorly.

Important: After replacing the module, you may need to flash the IMEI and MAC addresses, otherwise Wi-Fi and Bluetooth will not work.