Why Xiaomi spontaneously shuts down Wi-Fi: all the reasons and ways to solve

Have you noticed that your Xiaomi or Redmi Wi-Fi is periodically shut down for no apparent reason? The problem is familiar to many owners of devices based on MIUI — from the budget Redmi Note to the flagship Xiaomi 13 Pro. In some cases, the network disappears after 5 minutes of inactivity, in others — right while watching videos or downloading files, the causes can be hidden in software failures and hardware malfunctions.

In this article, we’ll look at all the possible reasons Xiaomi shuts down Wi-Fi, from the banal energy saving to the hidden settings of the router, how to distinguish a Wi-Fi module hardware defect from a MIUI software bug, what settings to check first, and what to do if standard methods don’t work, and at the end, you’ll find an FAQ with answers to the most common questions.

1.Energy saving is the main culprit

In 70% of cases, the problem lies in the aggressive energy saving policy of MIUI, which automatically turns off Wi-Fi to extend battery life, especially on devices with MIUI 12-14, and this applies not only to older models like the Redmi 4X, but also new ones like the Xiaomi 12T.

How does it work? When the screen is off or the device is in standby mode, the system thinks that the network connection is not necessary, and breaks the connection, sometimes even when you're using it actively, for example, while downloading a file in the background.

• 🔋 Turn off optimization for Wi-Fi: Go to Settings → Annexes → Application management → Three dots (menu) → Special access → Battery optimization. Find Wi-Fi and select No Limitations".
• ⚡ Set up the energy saving mode: in Settings → Battery and productivity → Select Power Saving Mode "Performance" or turn off the mode completely.
• 📵 Check Wi-Fi sleep settings: in Settings → Wi-Fi → In addition (cogs) → Connect during sleep, select "Always".

If you've had a problem with this manipulation, move on to the next point, and it's probably not about saving energy, it's about conflict with the router.

2. Conflict with router settings

Sometimes it's not the smartphone that's the router that's to blame, especially if Wi-Fi is turned off on all Xiaomi devices in the home, but it works consistently on other brands' phones.

How to check? Connect to your router from your computer (by cable or Wi-Fi) and access its web interface — usually at 192.168.0.1 or 192.168.1.1. Login and password are often listed on the sticker behind the device.

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If you can't find your router's settings, try resetting it to factory settings with the Reset button (hold 10 seconds). After reset, reset the network with the recommended settings.

Another common cause is channel congestion: If more than 10 devices are connected to a router, Xiaomi can “drop out” from the network, try to turn off unnecessary gadgets or divide devices into two frequencies (2.4 GHz and 5 GHz).

3. MIUI bugs and firmware conflicts

MIUI is known for its features, which sometimes work as bugs. For example, MIUI 12.5-14 had a WifiService module problem that caused the connection to be cut off when switching between networks, in some cases only a rollback to the old firmware helped.

How to diagnose:

• 📱 Check the version. MIUI: Settings → The phone. → Version. MIUI. If it is 12.5.3–12.5.7 or 13.0.4–13.0.9, the probability of a bug is high.
• 🔄 Update the system: sometimes the fixes come in the next updates. → Updating the system.
• 🧪 Enable Developer Mode and Turn Off Automatic Wi-Fi Switching to Settings → Additionally. → For developers.

If the update didn’t work, try resetting your network settings:

1. Go to Settings → System and device → Additional → Resetting.
2. Select "Reset Network Settings."
3. Confirm the action and restart the device.

If the problem remains after a reset or rollback, it may be the conflict with the applications that is to blame – this is discussed in the next section.

4. Conflict with applications and services

Some applications — especially VPNs, antiviruses, and “optimizers” — can block Wi-Fi access, such as Avast, Clean Master, or Super Battery aggressively manage network connections, leading to cliffs.

How to find the culprit:

1. Launch your phone in Safe Mode (hold the power button) →"Safe Mode. If Wi-Fi is stable, the problem is in one of the installed applications.
2. Return to normal mode and remove suspicious programs one at a time, checking the stability of the connection.

Pay particular attention to:

• 🛡️ VPN-Customers (NordVPN, ProtonVPN)
• 🔋 Battery optimizers (DU Battery Saver, Greenify)
• 🔍 Antiviruses (Kaspersky, 360 Security)
• 📡 Applications for Internet Speed Booster (Internet Speed Booster)

Start the phone in safe mode

Delete VPN-clientele

Disable battery optimizers

Check the settings of the antivirus

Reset permissions for suspicious applications-->

Even if safe Wi-Fi is turned off, the problem may be in the hardware — read on.

5. Hardware malfunctions: when it is time to go to the service

If all the software methods have been tried, but Wi-Fi still crashes, maybe the hardware is to blame.

• 📡 Wi-Fi antenna damage: often occurs after falls or impacts. Symptom - a weak signal even near the router.
• 🔌 Oxidation of the module contacts: due to humidity or corrosion, manifested as periodic breaks.
• 🔥 Chip overheating: If the phone is warming up in the top area (where the module is located), the connection may break.
• 🛠️ Bad ration: typical for budget models (Redmi) 5A, Redmi 6).

How to diagnose:

1. Check the stability of Wi-Fi in different conditions: near the router and in another room, when connecting to different networks (home, public, mobile hotspot).

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Go to the Wi-Fi information tab and look at the Wi-Fi status option, and if it's constantly changing from Connected to Disconnected, that's the problem in the module.

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If Wi-Fi is stable only near the router (1-2 meters), but disappears when removed - this is 99% hardware fault antenna or module.

Cost of repair:

If your device is warranty, don’t disassemble it yourself – contact the Xiaomi service center. For models older than 2 years, repairing can cost more than buying a new phone (for example, for the Redmi 4X or Redmi Note 5).

6 Hidden MIUI settings that few people know about

MIUI has hidden options that can affect the stability of Wi-Fi. They are not found in standard settings, but they are available through the engineering menu or ADB.

Method 1: Disabling network scanning

By default, Xiaomi is constantly scanning the surrounding networks, which can cause conflicts.

1. Activate Developer Mode (7 times click on "Version" MIUI" phone-setting).
2. Go to Settings → Additional → For developers.
3. Find the option to turn off Wi-Fi scanning and activate it.

Method 2: Changing Wi-Fi Country/Region

Sometimes it helps to change the Wi-Fi region to the US or EU (depending on the current one).

1. Install ADB on your computer and connect your phone.
2. Adb shell settings put global settings wifi_country_code US
3. Reset the device.

Method 3: Reset MAC-address

If your Xiaomi is banned from the network (for example, in public Wi-Fi), reset MAC-address:

1. Go to Settings → Wi-Fi → Additional (cog) → Private address.
2. Turn off the option, wait 10 seconds and turn it on again.

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Before installing custom firmware, back up the data through Settings → System and device → Backup: Not all functions (e.g, NFC or IR-blaster) can work properly.

If you decide to sell your phone because of a Wi-Fi problem, honestly report the malfunction in the aftermarket, these devices lose up to 30-50% of their value.

FAQ: Answers to Frequent Questions

If your question is not covered in the FAQ, try searching for a solution on the 4PDA or Xiaomi.eu forums, where specific model bugs are often discussed.