Pay after a few weeks of downtime, and the mobile phone cannot access the mobile network.

1 The mobile phone card is broken. You can try to get a new SIM card to see if it works. If it works, the SIM card is damaged and needs to be replaced.

2 mobile phone card arrears downtime. You can call the customer service phone in operation to confirm whether it is caused by arrears. If you can't make a phone call and don't have a service password, you can only go to the business hall to handle the inquiry business.

3 mobile phone terminal problems. Make sure there is nothing wrong with the SIM card of the mobile phone, then there is only something wrong with the mobile phone. The problem of the general mobile phone is nothing more than a system problem. You can try to restore the factory settings or brush the machine. The other is the problem of mobile phone hardware, which can only be determined after sale.