I put one plus five on Unicom's mobile card, indicating that there is no service.

The mobile phone prompts "Service Limited", which can be detected by the following methods:

1. Confirm whether your mobile phone is set to airplane mode;

2. Confirm whether your mobile phone is in arrears;

3. You can go to a place with a good signal and restart the machine;

4. You can change your card and try it on your mobile phone. If it works normally, it is recommended to go to the business hall for testing. If not, it may be caused by the mobile phone system. You can go to the mobile phone repair point to check your mobile phone.