The reasons and solutions for the failure of wifi connection are as follows:
1. The wifi password is wrong, which makes it impossible to connect, so you can't use it. Just enter the correct password;
2. The network settings of the mobile phone are faulty. Restore the network default settings and then connect;
3. If the wifi is connected and cannot access the Internet, it is because the wifi has no network signal or the network cable is unplugged. Plug in the network cable;
4. If the mobile phone hardware failure causes the inability to access the Internet, go to the mobile phone store or after-sales inspection and maintenance; China Telecom provides the best network communication service, and the telecommunications activities can be directly queried through the telecommunications business office or the entity business office.