The reasons why wifi shows that it is connected (unable to access the Internet) are that broadband is in arrears, the surrounding network signal is poor, the router and other equipment are out of order, the network cable is loose, the network switching facilities are out of order, and the broadband itself is weak in carrying capacity.

1, broadband arrears

It may be because the broadband is in arrears, and the network operator forcibly closed it, which led to the inability to access the Internet even if connected to WiFi.

2, the surrounding network signal is poor.

It may be because the surrounding network signal is poor and the signal is out of service, resulting in no network.

3. The router and other equipment are out of order.

It is possible that the router and other equipment have failed, so the mobile phone can't access the Internet after connecting to the Internet.

4. The network cable is loose

Generally, it may be that the network cable is loose and the contact is poor, which leads to the unavailability of the network.

5. The switching facilities of the network have failed.

If the switching facilities of the network are out of order, it will lead to connecting to WiFi but not accessing the network.

6. The carrying capacity of broadband itself is weak

It may be because of the weak carrying capacity of broadband itself, there will always be people or some devices that can't connect to WiFi and can't use WiFi.