1. It may be the wireless network itself. It is necessary to check whether there is a problem with the wireless network. If you are a wireless router user, please check whether you can use your computer to surf the Internet. If the computer can access the internet, it means that the network is fine.

2. Some people usually add advanced security settings to ensure that the wireless network is invaded by others. For example, set the IP or Mac binding function in the router. Once this function is turned on, only the bound mobile phone or computer can surf the Internet normally in the router, while the device without bound MAC information cannot surf the Internet normally even if the connection is successful.

3. If sometimes the mobile phone is far away from the coverage area of the wireless network, resulting in the low wireless network signal of the mobile phone, it is usually sometimes the case that the mobile phone is connected to the wireless network but cannot access the network. This situation is mainly caused by the instability of the data obtained by the mobile phone due to the low wireless signal, so it is suggested to use the one close to the wireless signal source to solve it.