1. Close and restart the Wi-Fi connection. When surfing the Internet with a mobile phone, a network IP address assigned by the Wi-Fi connection will be reserved in the mobile phone and applied to the current Wi-Fi. If there is no address conflict, don't worry. If there is a conflict, you must close and restart the Wi-Fi connection.

2. Check the password of the wireless network. Usually, the password of Wi-Fi should be changed regularly. However, when the network makes such adjustments, the mobile phone will not be updated automatically, and the password of Wi-Fi needs to be updated manually.