Oppoa9 can't send text messages.

The failure of sending and receiving short messages is generally caused by the wrong number of the information center, the arrears of the number, the abnormal reception and forwarding of the network base station, and the failure of the mobile phone. You can refer to the following methods to see if you can solve it:

1, consult the phone bill balance of the mobile phone card to see if there is any arrears;

2. Correct the information center number, first check whether the mobile phone information center number is correct (compare it with similar local cards or consult the operator to confirm the message center number);

3. Compare and observe the changes of SIM card and different time periods;

4. Try to restore the factory settings of the backup data;

If the above methods fail to solve your problem, please take the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and handling. You can quickly find the address and telephone number of OPPO Customer Service Center in the following ways:

1. Enter the OPPO official website-Service-Service Network for inquiry; 2. Enter OPPO+- Home-Recommendation-Customer Service-Service Network.