Lenovo SMS can't be sent out suddenly. What should a688t do?

According to the description, it is recommended to refer to:

1. First, confirm whether the mobile phone is in arrears. If so, make up the fee to the operator and try again.

2. Reconfirm whether the SMS cannot be sent to all contacts normally. If it is a personal contact, it is suggested to recall whether the relevant contact blacklist is set, or use some third-party SMS to intercept relevant functional software;

3. Rule out the above possibilities, or it may be caused by an abnormal SMS program. It is suggested that you can download other third SMS software for comparison, or find the corresponding SMS (or Lenovo address book) to clear the data "for improvement, and back up SMS, contacts and other materials before operation to avoid data loss;

4. If it is suggested to replace another SIM card, observe whether the short message can be sent normally, and do not rule out that it is caused by the abnormality of its own SIM card;

5. It cannot be improved after the above operations. It is recommended to back up the fuselage data and restore the factory settings to see if it can be improved.

If the problem still cannot be effectively solved, it is suggested to take time to go to a nearby Lenovo authorized repair station for specific inspection and treatment.