This is not a local problem, it should be a router or mobile phone problem.

Detailed solutions can refer to the following steps:

1, router problem: You can repair the transmitter of wifi, that is, the router, and restart the access network after repair;

2. Clean up the memory of the mobile phone: You can first use Tencent Mobile Manager to detect the problems of the mobile phone, and then deeply clean the mobile phone at the slimming place where the garbage has been cleaned;

3. The mobile phone is disconnected and reconnected to this wifi.