Wi-Fi authentication error on Xiaomi: what it means and how to fix it

You try to connect to a home or public Wi-Fi network on a Xiaomi smartphone, but instead of connecting, you see the words “Authentication Error”? MIUI, It can be used on new models (Redmi Note 12 Pro)+, POCO F5), Unlike the banal lack of a signal, an authentication error indicates problems with verifying the data to connect - a password, type of encryption or router settings.

In this article, we’ll break down the 7 main causes of authentication error on Xiaomi, including hidden settings. MIUI, You will learn how to distinguish a problem on the phone side from a router problem, why the network may work on other devices but not on your Xiaomi, and what to do if standard methods (reboot, network reset) do not help. We will pay special attention to specific bugs. MIUI, Which are not found on “pure” Android.

What does “authentication error” mean on Xiaomi?

The term "authentication" in the context of Wi-Fi refers to the process of authenticating a device before connecting to the network. When you enter a password, the router checks it against the stored data. If something doesn't match, there is an error. On Xiaomi, it can manifest in different ways:

• 🔄 Cyclical connection: the phone tries to connect, but through 2-3 For a second, ask for the password again.
• ❌ Instantaneous refusal: After entering the password, the notification “Authentication error” immediately appears».
• 🔌 Internet connection: Wi-Fi icon is active but no traffic (often accompanied by an exclamation point).

Nana MIUI 12–14 The error may be masked as other messages, such as “Can’t connect to the network” or “Save, protection” WPA/WPA2». It is important to understand that the problem is not always in the phone. 40% In some cases, the router settings are to blame, especially if the network is running on other devices.

⚠️ Note: If an error occurs after the update MIUI, Don't rush to reset your network settings. MIUI 13.0.4+ and MIUI 14 has a bug with the processing of networks with encryption WPA3 — Try to temporarily switch the router to WPA2-PSK.

7 Reasons for Xiaomi’s Authentication Error

We analyzed user reports and identified the key reasons Xiaomi is refusing to connect to Wi-Fi, some of which are unique to the brand’s devices:

1. Wrong password or character register – even if you are sure you are entering correctly MIUI may trigger a keyboard bug (e.g., automatic character replacement).
2. Incompatibility with encryption type – routers with WPA3 obsolete WEP Often conflict with Xiaomi.
3. Conflict MAC-Addresses – if the router is linked to MAC, a the phone uses a random address (function) MIUI privacy).
4. Network cache failures – stored data about previous connections can interfere with new authentication.
5. Router restrictions include filtering by device, limiting connections, or blocking Xiaomi as an “untrusted” manufacturer.
6. baga MIUI — firmware MIUI 12.5–13.0.3 had a problem with processing 5GHz networks.
7. Hardware malfunctions - damage to the Wi-Fi module (rare, but occurs after falls or moisture).

To narrow down the search, answer the questions:

• 📱 Does this network work on other devices?
• 🔄 Does the error occur on one network or all of them?
• 🔧 Have you recently changed your router settings or updated your router? MIUI?

How to Fix Authentication Error: Step-by-step Instructions

Start with simple methods and move on to complex. 90% of problems are solved by the first 4 points:

Make sure the password is entered correctly (try manually)

Reboot your phone and router

Try connecting to a 2.4 GHz network instead of 5 GHz (or vice versa)

Forget the network in Wi-Fi settings and connect again-->

1. Verification of password and type of encryption

Even if you are sure of your password, follow these steps:

1. Open the Settings. → Wi-Fi, tap on the problem network and select “Forget».
2. Enter the password manually, turning off autocomplete. MIUI Sometimes a Gboard or SwiftKey keyboard bug works, which substitutes incorrect characters.
3. If the password has capital letters, spaces or special characters (for example,!, #, $), Make sure the keyboard layout matches the input language.

If the password is correct but the error persists, check the type of network encryption:

• 🔒 WPA2-PSK (AES) — Best option for Xiaomi.
• ⚠️ WPA3 — may not work MIUI 12–13 (try to roll back on the WPA2 router-setting).
• ❌ WEP — outdated protocol, not supported by modern smartphones.

💡

Some routers (such as TP-Link or Keenetic) can enable mixed mode. WPA2/WPA3. This often solves the problem of compatibility with Xiaomi without losing security.

2. reset network settings on Xiaomi

If the problem isn't with the password, reset the phone's network settings, which will delete all stored Wi-Fi networks, Bluetooth devices and VPN-configuration:

1. Go to Settings → About Phone → Settings Reset → Reset your Wi-Fi, mobile network and Bluetooth settings.
2. Confirm the action and restart the device.
3. Try to connect to the network again.

⚠️ Attention: On Xiaomi with MIUI 14 After resetting the network, the option may disappear 5 GHz is on the list of available networks. To return it, go to Settings. → Wi-Fi → Additionally. → Wi-Fi standard and select 802.11 a/b/g/n/ac.

3.Tune in. MAC-address

MIUI by default uses random MAC-This may conflict with routers that have enabled binding to MAC. To disable a random address:

1. Go to Settings. → Wi-Fi.
2. Slip on the problem network, then click "More".
3. Find the option «MAC-Address (or “Privacy”) and select “Use” MAC-device».
4. Reconnect to the network.

If the router is enabled filtering by MAC, add in MAC-address of your Xiaomi:

1. Find out. MAC phone settings → The phone. → All parameters. → Status → MAC-Wi-Fi address.
2. Go to the router control panel (usually at 192.168.0.1 or 192.168.1.1).
3. Find the section "Filtration" MAC» or "Access Control" and add the address to the list of allowed.

4. Changes to regional Wi-Fi settings

On Xiaomi with Global Firmware (MIUI Global) sometimes triggers a bug related to regional restrictions on Wi-Fi channels, for example, in Russia, 1-13 channels are allowed for 2.4 GHz, and in the United States only 1-11. If the router uses an “unauthorized” channel, the phone will not be able to connect.

To change the Wi-Fi region to Xiaomi:

1. Activate Developer Mode: Go to Settings → About the phone and 7 times tap on the "Version" MIUI».
2. Return to the main settings, open "Extended settings» → «For developers».
3. Find the Wi-Fi Region option and select Russia (or the country where the router is used).
4. Reboot the phone.

5. Update firmware and rollback to stable version

If the error occurred after the update MIUI, Check for bug reports on forums (for example, 4PDA Some versions have critical Wi-Fi bugs:

To update or roll back the firmware:

1. Download the desired version of MIUI from the official Xiaomi website (choose Stable, not Developer).
2. Transfer the firmware file (.zip format) to the root folder of the phone.
3. Go to Settings. → The phone. → Update system, click on three dots in the upper right corner and select "Select firmware file».
4. Confirm the installation and wait for the reboot.

⚠️ Note: If you install custom firmware (e.g. xiaomi.eu), make sure it supports your model. on some devices (Redmi Note 10 Pro, POCO X3 Pro) informal firmware can disrupt the Wi-Fi module.

Problems on the router side: what to check?

If on Xiaomi, the authentication error appears with only one network and other devices are connected normally, the problem is most likely in the router.

• 🔄 Mode of operation: some routers (ASUS RT-AX88U, Netgear Nighthawk in "Only" mode 802.11r» (Fast Roaming) is in conflict with Xiaomi. disable this option.
• 🔒 Security Type: How previously mentioned, WPA3 It may not be supported. WPA2-PSK.
• 📡 Channel width: for 2.4 GHz, choose 20 MHz (not 40 MHz) to avoid interference.
• 🔧 Device filtering: Some routers (MikroTik, Ubiquiti) have the option of locking devices by manufacturer. Make sure Xiaomi is not blacklisted.

Also try to change the name of the network (SSID). Xiaomi sometimes has problems connecting to networks that have a name in their name:

• 🌐 Cyrillic or emoji (e.g., "Home Wi-Fi")🏠»).
• 🔢 Special symbols (#, @, &).
• 🔤 Gaps at the beginning or end.

Rename the network to Latin without spaces (e.g, HomeWiFi_5G) And try to connect again.

💡

If the router is dual-band (2.4 + 5 GHz, try to split networks and give them different names (e.g., GHz), and try to divide them, Home_2G and Home_5G). This will help to avoid conflicts when switching between ranges.

Hardware malfunctions: how to check the Wi-Fi module?

If none of the software methods worked, there could be a hardware problem.

• 📶 Wi-Fi/Bluetooth-module (especially after falls or moisture infestation).
• 🔌 Antenna contacts (poor contact after disassembly of the phone).
• 🔋 Power module (insufficient voltage due to bloated battery).

To diagnose a hardware malfunction:

1. Check if Bluetooth works. If it doesn't, it's the module that's the problem.
2. Connect your phone to another router (e.g., via a mobile hotspot) if the error persists, it is a malfunction on the Xiaomi side.
3. Run the hardware test through the engineering menu: ##4636## Go to Wi-Fi Information and see the Wi-Fi status. If it's Unavailable, the module is faulty.

On the Redmi Note 9 Pro models, POCO X3 NFC and others with a removable back cover, you can independently check the contacts of the antenna:

1. Turn off the phone and remove the lid.
2. Find the golden contacts of the Wi-Fi module (usually next to the battery).
3. Gently wipe them with an alcohol tampon and press your finger.
4. Collect your phone and check the connection.

⚠️ Warning: If Wi-Fi never worked after checking contacts, don't try to heat the module with a hairdryer or re-drink it yourself. on Xiaomi with Qualcomm Snapdragon (for example, Redmi). K40, Mi 11) this may cause damage to the processor.

What do you do if nothing helps?

If you’ve tried all the methods, but Xiaomi still issues an authentication error, try alternative solutions:

• 🔧 Use static. IP: Go to Settings. → Wi-Fi → Additionally. → Settings IP. Select "Static" and enter IP-address from your network range (e.g. 192.168.0.100 if router 192.168.0.1). Specify gateway (192.168.0.1) and DNS (8.8.8.8 or 1.1.1.1).

Connect through WPS

1. On the router, press the button. WPS (usually on the back).
2. On the phone in the Wi-Fi list, select the network and click “Connect through” WPS».
3. 🔄 Reset the router to factory settings (last resort if other devices don’t connect too).

In the most extreme case, you can roll back to an older version. MIUI or install custom firmware (for example, LineageOS), but this will require unlocking the bootloader and may deprive you of warranty.

FAQ: Frequent questions about authentication error on Xiaomi