1. Confirm whether there is a network. It is recommended to use it where the signal is strong;

2. Check whether the USIM card is inserted. If it still doesn't work when plugged in, it is recommended to go to the business hall to check whether the USIM card is faulty or change the card for testing;

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

4. Check whether there is phone bill in the account. If the balance is insufficient, you need to recharge it before you can use it.

5. Confirm whether the parameters of the mobile phone have been set. The specific setting method is as follows:

The main parameters that need to be set for 2G mobile phones are: connection name: GPRS, data bearing mode: GPRS, access point name: uniwap, user name and password: no need to set. Authentication: normal, gateway (proxy) IP address: 10.0. 172, connection security: off, connection type: permanent, optional port: 80 or 920 1.

Unicom 3G mobile phone parameters are set as: APN access point: 3gwap (case-insensitive), user name and password are empty, gateway/agent address: 10.0. 172, port number: 80, home page:.

The above situation has not been solved, you can contact Unicom's manual customer service to handle it.

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