What is the reason why there is no signal on the mobile phone?

There are many reasons why the mobile phone shows no service after plugging in the mobile phone card. Common ones are as follows:

First, the phone is in arrears. After the arrears, the operator will turn off the service function of the mobile phone. At this time, it will show that the mobile phone has no service. In this case, it is necessary to pay the arrears and recharge the new phone bill.

Second, the phone is set to flight mode. In airplane mode, the phone will display no service. In this case, the flight mode of the mobile phone can be turned off.

Third, the mobile phone does not support the mobile phone card of this operator. For example, the mobile phone only supports telecom cards, and inserting a mobile card means that the mobile phone will display no service. In this case, the mobile phone card needs to be replaced.

Fourth, there is no operator's network signal where the mobile phone is located, and many remote or closed environments cannot receive the operator's signal. In this case, you need to change the location and try again.

5. The mobile phone is out of order. There may be something wrong with the mobile phone system or mobile phone hardware. In this case, it is necessary to check the mobile phone at the mobile phone repair point.