Huawei Maimang 4 can't send text messages

Hello, please check the following points:

1. Check whether the number of SMS center is set correctly. The number of SMS center can be consulted with the operator.

2. Check whether the SIM card is in arrears.

3. Check whether there are sensitive words in the short message content, which are blocked by the operator.

4. Check whether sending repeated short messages to the same number is blocked by the operator, and consult the local operator for details;

5. Put the SIM card on other brands of mobile phones and check whether it can be sent normally. If not, please consult the operator.

If the above methods can't solve the problem, please upgrade the latest official firmware.

I wish you a happy new year in advance.