Lenovo A820 can receive short messages, but can't send them. What happened?

I'm sorry for the inconvenience.

In view of the problem that your short message cannot be sent normally, we suggest you refer to the following troubleshooting steps:

1. I suggest you confirm whether your mobile phone is in arrears first. If so, please make up the fee with the operator and try again.

2. Please confirm again whether the SMS can't be sent to all contacts normally. If it is a personal contact, I suggest you recall whether you have set up a blacklist of relevant contacts, or use some third-party SMS interception related functional software;

3. Excluding the above possibilities, it may also be caused by an abnormal SMS program. You can download other third SMS software for comparison, or go to System Settings-Applications-Find the corresponding SMS (or Lenovo Address Book)-Clear the data for improvement. Please back up SMS, contacts and other information before operation to avoid data loss.

4. If possible, it is recommended to replace other SIM cards to see if they can send short messages normally, and it is not excluded that it is caused by the abnormality of their SIM cards;

5. It cannot be improved after the above operations. I suggest you 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, for your normal use in the future, it is recommended that you take time to go to a nearby Lenovo authorized repair station for specific inspection and treatment.

Official authorized maintenance site inquiry:/Lenovo/WSI/station/servicestation/default.aspx? intcmp=MIDH

You are welcome to contact us at any time or visit Lenovo Lewen Bar () for consultation and understanding.