If your mobile phone can't surf the Internet normally, it is recommended to check the following contents:

1. Confirm whether there is a network, and suggest you use it where the signal is strong;

2. Check whether there is any phone bill in the account. If the balance is insufficient, it needs to be recharged before it can be used;

3. Confirm whether the parameters of the mobile phone have been set. The parameters of 3G mobile phone are: APN access point: 3gwap (case-insensitive), user name and password are empty, gateway/proxy address: 10.0. 172, port number: 80, home page:. Generally, parameters can be set;

4. Check whether the USIM card is inserted. If it's plugged in and still doesn't work, I suggest you go to the business hall to check whether the USIM card is faulty or not.

5. Check whether there is anything wrong with the mobile phone. I suggest you change your mobile phone for the test.

Excluding the above situation has not been resolved, you can contact the customer service of China Unicom.