The situation when the smartphone Xiaomi The wireless network stops detecting itself, appears suddenly and is frustrating. You're used to a stable internet connection, but suddenly the connection indicator disappears or shows a question mark. This can happen after a system update, a new router, or for no apparent reason.
This problem is widespread and affects both budget Redmi models and flagship Mi devices. It's often caused by a software driver conflict or a power-saving glitch, rather than a physical antenna failure. In this article, we'll explore all possible scenarios.
Before taking your device to a service center, it's worth trying a few steps that help in 90% of cases. We'll cover setting up frequencies, static IP addresses, and hidden Android settings.
Basic diagnostics and module reboot
The first step should always be a simple reboot. It sounds trivial, but that's exactly it. clear the cache Network services that may be stuck in the background. Don't just turn off the screen; perform a full system reboot.
If that doesn't help, try toggling the Wi-Fi module. Go to the notification shade, turn off wireless, and then turn it back on after 10-15 seconds. Sometimes the system needs time to re-initiate the airwaves scan.
Don't forget about your router. If it's connected for days, its RAM will become overloaded with error logs. Unplug the router for 30 seconds. This often solves the problem when the phone sees the network but won't connect.
⚠️ Attention: If after rebooting the router the problem disappears only for 5 minutes, then the problem is channel interference or overheating of the router, and not the phone.
Check if the internet is working on other devices. If your neighbor's laptop or tablet also isn't seeing the network, look for the problem in the settings. Xiaomi It's pointless. In this case, the focus shifts to the provider or the equipment.
Router frequency and channel settings
One of the most common reasons why Xiaomi The reason why 5 GHz Wi-Fi isn't detecting is because of regional incompatibility. In some countries, the use of certain channels is prohibited, and if the router's region is set to "USA" or "Europe" and the phone is set to "China" (or vice versa), the module will simply filter the signal.
It's also worth paying attention to the channel width. For a frequency of 2.4 GHz, the optimal value is 20 MHz, because 40 MHz In apartment buildings, the network is often clogged with neighboring networks. The phone may see the network, but it won't be able to authenticate due to the high noise level.
Try manually setting a static channel in your router settings. Automatic selection often results in the router jumping to a busy channel, and the smartphone loses connection.
Recommended static channels for 2.4 GHz: 1, 6, 11The situation is different for the 5 GHz band. Here, it's best to choose channels 36 to 48 or 149 to 165. Higher channels (DFS) may not be supported by some modules in budget smartphones. Redmi or Poco.
⚠️ Warning: Changing router settings may temporarily disrupt connection to all devices. Make sure you have access to the admin panel via cable or mobile data.
Dual-band router owners often combine 2.4 and 5 GHz networks under a single name (Smart Connect). Older or budget Xiaomi models may not work properly with this feature, constantly switching between frequencies and losing packets.
IP and DNS conflict
Sometimes your phone connects successfully to the router, but the Wi-Fi icon remains lit and the internet connection is down. This often indicates an IP address conflict. The router may have assigned your phone an address that's already taken by another device on the network.
To resolve this issue, you need to change your IP settings from DHCP to static. This will force the phone to use a specific address, eliminating confusion. Go to Wi-Fi settings, tap your network name, and select "Edit" or "IPv4 Settings."
In the "IP Settings" field, select "Static". You will need to enter the gateway address (usually 192.168.0.1 or 192.168.1.1) and DNS servers. Using public DNS from Google or Cloudflare often speeds up network response.
| Parameter | Value for example | Description |
|---|---|---|
| IP address | 192.168.1.128 | Unique phone address |
| Gateway | 192.168.1.1 | Your router's address |
| DNS 1 | 8.8.8.8 | Google DNS |
| DNS 2 | 1.1.1.1 | Cloudflare DNS |
After saving the settings, the network will reconnect. If the "Obtaining IP address..." error persists, the issue lies with address distribution within the local network.
It's also worth checking if your router has a MAC address filter enabled. If your phone is new and the blacklist is active, the router will ignore connection requests even if the password is entered correctly.
☑️ Check network settings
Reset network settings and delete profiles
Accumulated errors in saved network profiles can cause crashes. Android stores the configurations of every Wi-Fi network ever connected, and if the configuration file is corrupted, the system may behave erratically.
Go to your Wi-Fi settings, find the problematic network, and select "Delete" or "Forget Network." Then, re-enter the password. This will update the encryption keys and handshake parameters.
A more radical, yet effective, method is a complete network reset. This will delete all saved Wi-Fi passwords, Bluetooth settings, and mobile networks (APNs), but will return the modules to their factory settings.
The path to the function is usually found in the menu Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and BluetoothIn some versions of MIUI or HyperOS the path may differ: Advanced settings → Backup and reset.
⚠️ Note: After resetting your network settings, you will have to re-enter passwords for all Wi-Fi networks and re-pair Bluetooth devices, such as watches or headphones.
This method often helps when the phone "glitches" after an operating system update. A reset clears the network interface driver cache.
The Impact of MIUI and HyperOS Power Saving
Xiaomi's custom skins are notorious for their aggressive power management. The system can disable Wi-Fi to save battery if it detects you're not actively using the phone, or if Sleep Mode is enabled.
Check your battery settings. Go to Settings → Battery → Power SavingMake sure "Ultra Mode" or "Airplane Mode" aren't enabled (sometimes software can cause them to stick). You should also disable the "Turn off Wi-Fi in sleep mode" option, if available in the advanced settings.
New versions of HyperOS include speed optimization features that can force you to switch from Wi-Fi to mobile data if the system detects a weak Wi-Fi signal, even if it's stable.
Try disabling the "Wi-Fi Assistant" feature or similar names in the Wi-Fi menu. This service constantly monitors connection quality and can disconnect if it thinks mobile data is faster.
Hidden Engineer Settings
In the dialing menu, enter ##6484## to enter the engineering menu. You can check the antenna status (WiFi Test) there, but changing the parameters without proper knowledge is not recommended, as it could permanently damage the module.
Hardware problems and module failure
If software solutions don't help, there's a high probability of a physical malfunction. In Xiaomi smartphones, especially models with metal cases or after drops, antenna module contacts can break off.
Symptoms of hardware failure:
- 📶 Complete absence of a list of networks (gray list or empty).
- 🔥 Strong heating of the lower part of the case in the camera area.
- 🔄 Endless loop "Connecting... Authentication error".
- 📉 A sharp drop in signal strength near the router (less than 1 bar within 2 meters).
A common issue with the Redmi Note series and some Mi flagships is the antenna contact becoming detached from the motherboard. This can only be resolved by disassembling and pressing the contact back on, or by re-soldering.
It's also possible for the Wi-Fi/BT module (chip) itself to fail. In this case, Bluetooth often stops working at the same time, as they are often integrated into a single chip.
If the phone was exposed to moisture, oxidation of the contacts could have occurred at the antenna connector. This can only be visually detected under a microscope at a service center.
Frequently Asked Questions (FAQ)
Why does Xiaomi see Wi-Fi, but says "Connection Error"?
Most likely, the password was entered incorrectly, or MAC address filtering is enabled on the router. The issue could also be related to incompatible encryption standards (WPA2/WPA3). Try changing the router's security type to WPA2-PSK (AES).
My phone can't see the 5 GHz network, only 2.4 GHz. Is this normal?
If your router broadcasts a 5 GHz network but your phone doesn't see it, check the router's region. Some Xiaomi models for the Chinese market (CN version) don't see channels 12-14 in the 2.4 GHz band or certain 5 GHz channels permitted in Europe.
Will flashing the firmware help if Wi-Fi has stopped working?
If the problem is caused by a software driver glitch after a failed update, yes, flashing the firmware using Mi Flash Tool may help. However, if the problem is hardware-related (a burned-out chip or antenna), flashing the firmware won't fix the issue.
Does the case affect Wi-Fi signal reception?
Metallic cases or cases with magnetic closures can shield the antenna. Remove the case and check the signal strength. If it increases, you've found the cause.