Why can't lgls992 make calls or surf the Internet when I plug in the China Unicom card? There is no response at all! ! ! ! There is a sign welcoming China Unicom card.

If there is no service on the mobile phone, there may be the following reasons:

1. The mobile phone card is not inserted properly and the contact is poor;

2. The location cannot be searched The network signal or network signal is unstable;

3. The mobile phone card, card slot or mobile phone terminal is damaged;

4. The mobile phone card status is abnormal (such as shutdown, account cancellation, etc. Status);

5. Mobile terminals do not support China Unicom network.

You can try the following solutions:

1. Turn the phone on and off and restart to test;

2. Re-insert the phone card and check if there is a card slot Looseness, deformation and other poor contact conditions;

3. Change the location and search the network again or ask the surrounding users whether the use is normal;

4. Change the card and mobile phone to test to see if it is the problem. The mobile phone card or terminal is faulty;

5. Verify whether the status of the mobile phone card is normal;

6. Verify whether the mobile phone terminal supports China Unicom network.

If the above method still cannot solve the problem, it is recommended to contact the local China Unicom customer service or consult the official mobile phone customer service.