Why Xiaomi Wi-Fi Loses: All the Reasons and How to Fix It

You are sitting with your phone Xiaomi in your hands, and the internet appears and disappears as if by magic? Or the network refuses to connect at all, even though everything works reliably on other devices? The problem with Wi-Fi dropping out on smartphones Redmi, POCO or Mi — is one of the most common. And the phone itself isn't always to blame: the reasons can lie in the router, Android settings, and sometimes even in hardware failures.

In this article we will look at all possible reasons, on which Wi-Fi is available Xiaomi is behaving erratically—from a simple settings glitch to hidden defects in the communication module. You'll learn how to diagnose the problem, which parameters to check first, and what to do if none of the standard methods help. And for owners of older models (for example, Redmi Note 4X or Mi A1) we will consider separately Features of working with outdated Wi-Fi chips, which often conflict with modern routers.

Spoiler: in 80% of cases, the problem can be resolved without a service center—it's enough to configure the network correctly or update the firmware. However, there are also tricky cases where the phone's Wi-Fi module itself is at fault. Read on to find out how to tell the difference.

1. Router Problems: Why Xiaomi Can't Maintain a Network

The first thing to check is this signal sourceUsers often blame their phone, when in fact the problem lies in the router settings. Here are the most common scenarios:

• 🔄 Channel congestion: If too many devices (especially smart gadgets) are connected to the router, it may start to reset the least active ones, including yours. Xiaomi.
• 📶 Incompatibility of standards: old phones (eg Redmi 3S or Mi 4) do not support modern Wi-Fi 6, and new routers sometimes refuse to work correctly with outdated ones Wi-Fi 4 (802.11n).
• 🔒 MAC address blocking: Some routers have a device filtering feature, and if the MAC address of your Xiaomi If you are blacklisted (for example, after a crash), your access will be restricted.
• ⚡ Saving router energy: You may have a "Green Wi-Fi" or similar mode enabled in your settings, which disables data transfer when activity is low.

How to check? Connect another device (such as a laptop or tablet) to the same router. If the internet connection is stable there, the problem is definitely with your phone. If the connection drops on other devices as well, the router is to blame.

⚠️ Attention: If you have a router Xiaomi (For example, Mi Router 4A or AX3600), check if the function is enabled Mi Wi-Fi EnhancerIn some firmware versions, it conflicts with smartphones of the same brand, causing intermittent connection interruptions.

2. Phone settings: what could go wrong

Even if the router works perfectly, incorrect settings in fact Xiaomi can cause Wi-Fi to drop. The most common culprits are:

• 📵 Airplane mode: sometimes it turns on accidentally (for example, when removing the SIM card) and blocks all wireless modules, including Wi-Fi.
• 🔋 Aggressive battery optimization: system MIUI Can force Wi-Fi to turn off in the background to save battery.
• 🔄 Automatic switching to mobile data: There is an option in the settings that switches the phone to 4G/5G when the Wi-Fi signal is weak.
• 📡 Incorrect Wi-Fi mode: if selected in manual mode 802.11a (5 GHz), and the router only works on 2.4 GHz, the connection will be constantly broken.

How to fix? Go to Settings → Wi-Fi and check:

1. Is airplane mode disabled (airplane icon in the notification shade).
2. Is the option enabled? Always look for networks (in additional Wi-Fi settings).
3. Turn it off Intelligent switching in the section SIM Cards and Mobile Networks → Switching to Mobile Data.
4. Set the mode Auto in the Wi-Fi range settings (if there is a manual choice between 2.4 GHz and 5 GHz).

Disable Airplane Mode|

Check if Wi-Fi is enabled in the notification shade|

Disable Smart Switching on Mobile Data|

Set Wi-Fi range to Auto|

Update MIUI firmware to the latest version-->

If the network still disappears after these steps, proceed to the next section - the problem may be deeper.

3. Firmware failures and software conflicts

MIUI - branded shell Xiaomi — is known for its "features" that sometimes don't work as intended. One of them is automatic connection management, which can disconnect Wi-Fi without warning. Furthermore, Wi-Fi module bugs often appear after updates.

Typical symptoms of software failures:

• Wi-Fi connects, but after 5-10 minutes it disconnects by itself.
• Your network keeps appearing and disappearing from the list of available networks.
• When connecting, it says "Obtaining IP address", but the process drags on forever.
• After rebooting the phone, Wi-Fi works fine, but after a while it starts glitching again.

Solutions:

1. Update the firmware to the latest version: Settings → About phone → System update.
2. Reset network settings: Settings → System → Reset settings → Reset Wi-Fi, mobile data, and Bluetooth.
3. Disable battery optimization for Wi-Fi:

   Settings → Battery & performance → Battery optimization → See all apps → Find "Wi-Fi" and select "Unlimited"

4. Clear cache and data from the Wi-Fi module:

   Settings → Applications → Manage applications → Three dots (menu) → Show system → Find "Wi-Fi" → Storage → Clear cache and data

What to do if the update doesn't help?

If the problem persists after updating, try rolling back to the previous version of MIUI. To do this:

1. Download the old firmware from the official website Xiaomi (section "Archive").

2. Rename the file to update.zip and place it in the root folder of your phone.

3. Go to Settings → About phone → System update → Three dots → Select firmware file.

4. After the rollback, perform a factory reset.

⚠️ Warning: Firmware downgrade may result in data loss if you do not back up your device beforehand.

4. IP and DNS conflicts

If your Xiaomi connects to the network, but the Internet does not work (the Wi-Fi icon is there, but the pages do not load), the problem may be related to IP address assignment or the operation of DNS servers. This is especially relevant for public networks (in cafes, airports) or routers with non-standard settings.

Signs of a problem:

• The connection status says "Connected, no internet access."
• Websites don't open, but messengers (for example, WhatsApp or Telegram) are working.
• When diagnosing a network, the error "DNS server is not responding" appears.

Solutions:

5. Hardware failures: when the hardware is to blame

If all software methods have been tried and Wi-Fi is still on Xiaomi still disappears, maybe the problem lies in hardware. The following are most often affected:

• 📡 Wi-Fi module: Over time, contacts oxidize or come off the board, especially after being dropped or exposed to moisture.
• 🔋 Wi-Fi antenna: in some models (for example, Redmi Note 8 Pro) the antenna is attached with latches that can break off.
• 🔌 Module power connector: If the phone was dropped or disassembled, the contact could be broken.

How to diagnose a hardware failure:

1. Try connecting to a different Wi-Fi network (for example, share internet from another phone). If the problem persists, the phone is at fault.
2. Turn on Developer mode (click 7 times on MIUI version in the phone settings) and check the Wi-Fi log:

   Settings → Advanced → Developer options → Wi-Fi log

   If there are a lot of errors like Disconnected or Authentication problem, this may indicate problems with the module.

3. Shine a flashlight on the back of your phone where the Wi-Fi module is located (usually at the top). If you see signs of oxidation or moisture, this is a clear sign of a problem.

⚠️ Attention: If your Xiaomi fell into water or was subjected to strong impacts, do not try to disassemble it yourself — this could cause a short circuit. In such cases, contact a service center immediately.

Cost of repairing a Wi-Fi module in Xiaomi varies from 1,500 to 5,000 rubles depending on the model. In some cases (for example, on Redmi 9A) It's cheaper to buy a new phone than to repair an old one.

6. Features of older Xiaomi models

If you have a phone older than 2018 (eg. Redmi 4X, Mi 5, Mi Max 2), then the problem with Wi-Fi may be related to outdated hardwareHere's what's typical for older models:

• 🐢 Slow connection to modern routers: old Wi-Fi chips (eg. Broadcom BCM4339) do not support new encryption standards (WPA3) and may "freeze" when connected.
• 🔄 Frequent dropouts at 5 GHz: many budget models Xiaomi those years had problems with stability of operation in the 5 GHz range.
• 🔋 Wi-Fi module overheating: Due to a weak cooling system, the chip could overheat and shut down.

Solutions for old phones:

1. Configure your router to work in wireless mode 802.11n (turn off 802.11ac And 802.11ax).
2. Disable encryption WPA3 on the router, leave only WPA2-PSK.
3. If your phone is overheating, reduce its load (close background applications) or use it in the 2.4 GHz band.
4. Install custom firmware (for example, LineageOS), where the bugs of the original were fixed MIUI.

7. Viruses and malware

Few people realize that viruses may affect Wi-Fi performance. Some malware specifically blocks internet connections in order to:

• 🕵️‍♂️ Replace ads in your browser.
• 💰 Redirect traffic through a proxy for cryptocurrency mining.
• 📤 Steal data transmitted over the network.

Signs of infection:

• Wi-Fi works, but some websites don't open (especially banking or social networks).
• A lot of traffic is being consumed in the background (check in Settings → SIM cards and mobile networks → Data usage).
• Unfamiliar apps or ads appear in the notification shade.

How to clean your phone:

1. Install an antivirus (for example, Dr.Web or Kaspersky) and scan the system.
2. Check the list of installed applications for suspicious ones (Settings → Applications → Manage applications).
3. Reset your phone to factory settings (don't forget to make a backup!).
4. If viruses remain, reflash the phone through Fastboot (instructions are on the forum) 4PDA).

8. When to contact the service center

If you have tried all the methods in this article, but Wi-Fi is not working Xiaomi If it still doesn't work, it's time to admit: the problem is serious and requires professional intervention. Here are the cases Necessarily You need to take your phone in for repair:

• 💥 The phone was dropped, got wet, or was subjected to mechanical impact.
• 📡 The Wi-Fi module is not detected in the system (in Settings → About phone → All specifications → Status no Wi-Fi MAC address information).
• 🔥 The phone overheats in the Wi-Fi antenna area (upper part of the case).
• 🔌 After disassembling the phone (even if you just changed the battery), Wi-Fi stopped working.

The average cost of diagnostics at service centers is 500–1,000 rubles. Repairing or replacing a Wi-Fi module will cost 2,000–6,000 rubles, depending on the model. For phones older than 3–4 years, repairs are often uneconomical—it's cheaper to buy a new device.

⚠️ Attention: If your Xiaomi If your device is under warranty, do not attempt to repair it yourself! Opening the case or reflashing the firmware will void the warranty. Contact authorized service centers only.

Before visiting the service:

1. Make a backup copy of all data (photos, contacts, messages).
2. Write down the IMEI of your phone (type *#06#).
3. Check with the technicians to see if they provide a warranty on repairs (it should be at least 3 months).

FAQ: Frequently asked questions about Wi-Fi dropping out on Xiaomi devices

My Xiaomi connects to Wi-Fi, but the internet isn't working. What should I do?

Most likely, the problem is related to your DNS or IP address. Try:

1. Restart the router and phone.
2. In the Wi-Fi network settings, set a static IP and DNS (for example, 8.8.8.8).
3. Disable VPN if it is enabled.

If that doesn't help, check if your router is blocking your phone by MAC address.

Wi-Fi only works near the router. What's wrong?

This is a typical weak signal issue. Possible causes:

• The router operates at a frequency 5 GHz, which passes through walls worse.
• The Wi-Fi antenna in the phone is damaged.
• The transmission power has been reduced in the router settings.

Solution: Switch the router to 2.4 GHz or install a repeater (signal booster).

Wi-Fi stopped working after updating MIUI. How do I downgrade?

If the problem appeared after an update, you can try rolling back:

1. Download the old firmware from the official website Xiaomi (section "Archive").
2. Rename the file to update.zip and place it in the root of your phone's memory.
3. Go to Settings → About phone → System update → Three dots → Select firmware file.

⚠️ Warning: Rolling back may result in data loss if you don't make a backup!

My Xiaomi's Wi-Fi isn't working after replacing the screen. Why?

Most likely, the Wi-Fi antenna cable was damaged or the module connector was disconnected when disassembling the phone. In some models (for example, Redmi Note 7) the antenna is attached to the back cover, and when replacing it, you can accidentally tear off the contact.

Solution: Disassemble the phone and check if the Wi-Fi module cable is connected to the motherboard. If you're unsure, take it to a service center.

Is it possible to fix Wi-Fi on a Xiaomi device yourself?

If the problem is software-related (settings glitches, viruses, firmware errors), yes, you can fix it yourself by following the instructions in this article. However, if the problem is hardware-related (damaged module, antenna, or contacts), it's best not to risk it without experience in electronics repair.

Self-repair is justified if:

• You have experience in soldering microelectronics.
• You can buy an original Wi-Fi module for your model.
• The phone is no longer under warranty.

In all other cases, please contact professionals.