The SMS sending function of Huawei Maimang 4 has been disabled. What happened?

1. To confirm whether the SIM card used is in arrears, you can call the operator's customer service hotline to check whether it is in arrears;

2. Please use the SMS application that comes with your mobile phone to send SMS. SMS applications that can be installed by themselves may be rejected by the Android security system when sending SMS.

3. Please call the customer service hotline to contact the operator to get the correct SMS center number, and click "Settings" on the mobile phone-> "information"->; In the "SMS Center", confirm whether the number of the SMS Center is consistent with the number obtained by the operator. If the setting is wrong, please update the SMS center number obtained by the operator.

4. If the above three measures can't solve the problem, please back up the important data first, restore the factory settings, and then confirm whether the problem is solved.

5. If the above operations still can't solve the problem, please contact the after-sales service outlets for maintenance.