Hello, what should I do if this OPPO A73t message can't be sent?

Hello, what should I do if this OPPO A73t message can't be sent? It is recommended to call the customer service hotline of the communication operator to switch to manual operation, and consult the information parameter setting in detail; Compare and observe the changes of calling cards and eliminate abnormal calling cards. After the above attempts, the problem still exists. You can take your mobile phone to the customer service center for free testing, and you can quickly find the address and phone number of the OPPO customer service center by the following methods:

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