My Unicom mobile phone card suddenly has no service. What happened?

First of all, there are many reasons why Unicom's mobile phone card suddenly has no service, such as signal problems, account problems and mobile phone problems. In order to solve this problem, we can try to restart the phone, check the account balance, and replace the phone or SIM card.

1. Signal problem: A common reason why Unicom's mobile phone card has no service is signal problem. If your location signal is not good, or there are obstacles such as tall buildings and tunnels around you to block the signal, it may cause the mobile phone card to be out of service. At this point, you can try to move to an open area or wait for the signal to resume.

2. Account number problem: If Unicom's mobile phone card is in arrears, it will also lead to no service. You can check the account balance and payment records through Unicom's mobile phone business hall or online business hall to ensure the normal status of the account. If the account is in arrears, it needs to be recharged in time.

3. Mobile phone problem: Sometimes, the service of mobile phone card is not in place, which may be the problem of mobile phone itself. For example, the mobile phone card slot is damaged and the mobile phone system crashes, which may lead to the inability to serve. At this point, you can try to restart the phone and replace the phone or SIM card to solve the problem.

4.SIM card problem: Damaged or expired SIM card may also lead to no service. You can check whether the SIM card is inserted correctly. If there is something wrong with the SIM card, you need to go to Unicom's business hall to replace it with a new one.

For example, suppose you use Unicom's mobile phone card in a basement and suddenly find that the mobile phone has no service. You can try to move to an empty place first and see if the signal is restored. If the signal is still bad, you can check the account balance to make sure there is no arrears. If the account status is normal, you can try to restart the phone or change it to another phone for testing. If the problem still exists, there may be something wrong with the SIM card, and you need to go to Unicom's business hall to replace a new SIM card.

In short, to solve the problem that Unicom's mobile phone card suddenly has no service needs to be checked and checked from many aspects. If the above methods can't solve the problem, it is recommended to contact Unicom customer service or consult Unicom business hall.