If Unicom card is used, there is no signal or signal difference at this position, and it is not excluded that it is caused by other objective conditions. Because the signal will be affected by various factors such as topography, landforms and tall buildings. If your location is relatively closed, the signal will be affected. The treatment method is as follows:

1. Shut down again and try again;

2. Replace the mobile phone card with the mobile phone of family or friends and try again;

3. See if the signals of other Unicom users around are normal.

If the problem cannot be solved after self-service troubleshooting, it is suggested that you can contact the artificial customer service of China Unicom and provide detailed address and problem information for verification and handling. The specific situation is subject to local policies.

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