Red rice note mobile phone can't send text messages, but can only receive them. What's the matter?

Xiaomi mobile phone can't send text messages during use. The following methods are recommended for troubleshooting:

1. You can try changing the number of the SMS center. The specific settings are: SMS interface → menu key (long press the menu key in the new version of the system) → Settings → Advanced Settings → Set the number of SMS center, for example, +86 1380000000. However, the number of SMS centers varies from region to region, and the specific number of SMS centers needs to be consulted with operators.

2. If you still can't send SMS, you can insert the SIM card into another mobile phone, set the SMS center number, and then try to insert the SIM card back into the mobile phone again. Tips: If the phone is in arrears, you can't send text messages.