If you can't send and receive text messages, the SMS center fails to modify the number and will display +7. You have tried to refresh the machine and clear the data, but it still works. 1S is a newly

If you can't send and receive text messages, the SMS center fails to modify the number and will display +7. You have tried to refresh the machine and clear the data, but it still works. 1S is a newly developed system. I suggest you click on the method to view:

Whether the SIM card is inserted correctly.

② Whether the SIM card is inserted incorrectly, such as the standard version inserted with the telecom SIM card, etc.

(3) Enter the hardware test to check whether the SIM card works normally (just enter * # * # 64663 # * * in the dialing interface). If the SIM card status is normal, go to step 5; If the status is unknown, go to step 4.

④ Try to replace a different SIM card. If the status is still unknown during hardware testing, it is recommended to go to the maintenance point for testing; If the detection status is normal, the operator is advised to replace a SIM card (SIM card may be aging).

⑤ Whether the network type is correct and whether the operator selection is automatic. (Unicom preferred 3G, mobile preferred 2G, and telecom preferred automatic)

⑥ If the network type of telecom mobile phone is CDMA automatic, the problem can be solved by changing the network type to "WCDMA priority" in the mobile phone information (* # * # 4636 # * *).

⑦ Whether there is no signal in this area. You need to check whether other mobile phones on the same network have a signal.

⑧ Back up the data, brush it to the latest system version and try again.

Pet-name ruby If the above methods still can't help you solve the problem, please go to the maintenance point near you for maintenance and testing.