What should I do if I don t have a service? Restart your phone

No service is displayed, we recommend that you troubleshoot it by following the following methods:

Whether the SIM card is inserted correctly.

Whether the wrong SIM card is inserted, such as the standard version inserts the telecom SIM card, etc.

Go to Hardware Detection to see if the SIM card is working properly (enter * * on the dial screen). If the SIM status is normal, go to step 5, or if the status is unknown, go to step 4.

Try to replace a different SIM card, if the status is still unknown during hardware testing, it is recommended to go to the repair point for testing; If the detection status is normal, it is recommended to go to the carrier to replace a SIM card (the SIM card may be aging).

Whether the network type is correct and whether the carrier selects Automatic. (China Unicom selects 3G priority, mobile selects only 2G, and China Telecom selects automatic).

If the network type of the non-telecom mobile phone is CDMA automatic, you need to change the network type to "wcdmapreferred" in the mobile phone information (**) to solve the problem.

Whether there is no signal in the area. You need to check whether other mobile phones on the same network have signals.

Back up your data, flash to the latest system version and try again.

If the above methods still do not help you solve the problem, please go to your nearest repair center for repair and inspection.

If the phone is not broken, it may be that the SIM is aging and a SIM card is replaced.

If your mobile phone cannot access the Internet normally, please check the following conditions:

1. After 3-5 minutes of power off, restart the phone and try again;

2. Confirm whether there is a network, it is recommended that you can use it in a place with a strong signal;

3. Check whether there is still a phone bill, if the balance is insufficient, you need to recharge before you can use it;

4. Check whether the USIM card is inserted, if it has been inserted but still cannot be used, it is recommended that you go to the business hall to check whether the USIM card is faulty, or replace the card for testing;

5. If the monthly traffic reaches the maximum value, the network will be automatically closed, and it is recommended that you leave a text message reminder or inquire about the **product description.

Summary. Dear, hello, why do you consult why my mobile phone sometimes always shows no service, but once restarted, the answer is as follows: 1. The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the SIM card circuit cannot work, and the mobile phone can not communicate with the network base station.

2. The mobile phone is incompatible with the system due to the application software for installation, resulting in the system software closing the modem in the mobile phone signal processing circuit, at this time you can turn off the mobile phone and then restart, the modem in the mobile phone signal circuit will be restarted, and after the signal is normal, delete the suspicious mobile phone application software installed before the problem. 3. The SIM card of the mobile phone is not registered in the network, at this time, you can insert this SIM card into another mobile phone, if it also shows no service as the reason for the SIM card. 4. If the SIM card of the mobile phone is accidental, and there is no signal in the network signal coverage area, it fails to reconnect to search the network and merge the book, at this time, you can manually search for network registration under the menu of Settings - General - Network - Network Operator.

5. If the signal coverage of the mobile phone SIM card network operator is not covered, you can change the location to an open area, and then check the mobile phone signal grid display, such as the display after changing the location.

Why does my phone sometimes always show no service, but once it restarts, it is fine.

Dear, hello, why do you consult why my mobile phone sometimes always shows no service, but once restarted, the answer is as follows: 1. The SIM card of the mobile phone is in poor contact with the shrapnel of the mobile phone card slot, resulting in the SIM card circuit cannot work, and the mobile phone can not communicate with the network base station. 2. The mobile phone is incompatible with the system due to the application software for installation, resulting in the system software closing the modem in the mobile phone signal processing circuit, at this time you can turn off the mobile phone and then restart, the modem in the mobile phone signal circuit will be restarted, and after the signal is normal, delete the suspicious mobile phone application software installed before the problem.

3. The SIM card of the mobile phone is not registered in the network, at this time, you can insert this SIM card into another mobile phone, if it also shows no service as the reason for the SIM card. 4. If the SIM card of the mobile phone is accidental, and there is no signal in the network signal coverage area, it fails to reconnect to search the network and merge the book, at this time, you can manually search for network registration under the menu of Settings - General - Network - Network Operator. 5. If the signal coverage of the mobile phone SIM card network operator is not covered, you can change the location to an open area, and then check the mobile phone signal grid display, such as the display after changing the location.

5. If the signal coverage of the mobile phone SIM card network operator is not available, you can change the location to an open area, and then check the mobile phone signal grid display, if the display is normal after changing the location, you can call the network operator service ** for feedback and complaints. 6. **The card has been used for too long, and with a valid certificate, you can go to the local business hall to reapply for a card.

Dear, it is recommended to reissue, my mobile phone has also appeared like this before, and there will be no <> after reissue

If the SIM card is fine, it is recommended that you use the spring feet of the SIM card slot with a needle, and pick up a little before trying.

Try to reinsert the SIM card, if it doesn't work, just turn on the volume up button + power button to turn on and reflash the system.

There was no such situation before, so try to restore the factory settings first. The newly purchased mobile phone may not be compatible with the network standard.