2. Please go to System Settings-Applications-Software-Clear Data, or uninstall it, and then go to Xiaomi's app store to download it again to see if it can be used normally.
3. If it can't be restored, please back up the data and enter the data for restoring Sanqing. When you restore a backup, set this item not to be restored and try to make it normal.
4. To resume, please enter System Update-Menu-Restart to resume entry, or press and hold the volume up+power on key to enter after shutdown.
If the mobile phone shows that it is connected to the wireless network, but it still cannot access the Internet, it is suggested that:
1. Turn off and restart the phone, reset the router, and then reconnect the wireless network.
2. Please confirm the transmission bandwidth of the router (the bandwidth supported by the router supporting 802. 1 1n is 40mhz, and it is recommended to set it to 20mhz), and then confirm whether the router network is normal again.
3. Confirm whether IP address filtering /MAC address filtering is set in the router.
4. If you still can't surf the Internet through WLAN, it is recommended to try using static IP mode: Settings -WLAN- Select a wireless hotspot-Show advanced options-Check-Slide the screen down -IP settings-Static -IP address/gateway.
5. Try connecting other routers.
6. Try to restore the factory settings after the important data of the mobile phone is backed up.
If the problem still exists, it is recommended to take the purchase invoice, three-guarantee certificate and mobile phone to the service center for inspection by engineers.