What if Xiaomi's mobile phone shows no service with Unicom card?

The mobile phone is out of service for the following reasons: 1. The mobile phone card is not plugged in properly and the contact is poor; 2. No network signal can be found at this location or the network signal is unstable; 3. The mobile phone card, card slot or mobile phone terminal is damaged; 4. The status of the mobile phone card is abnormal (such as shutdown and account cancellation). ); 5. The mobile terminal does not support Unicom network. You can try to solve it in the following ways: 1. Restart the phone and test; 2. Plug in the mobile phone card again. Is the check card slot loose or deformed? 3. You can search the network again in another location or ask the surrounding users if they are normal; 4. Change the card and do a mobile phone test to find out whether there is something wrong with the mobile phone card or the terminal; 5. Verify whether the status of the mobile phone card is normal; 6. Verify whether the mobile terminal supports Unicom network. If the above methods still can't solve this problem, you can suggest contacting the local Unicom customer service or consulting the official mobile phone customer service.