My mobile phone can send MMS instead of SMS. What should I do?

There are several reasons why the mobile phone can't send MMS:

1. The mobile phone does not support MMS function;

2. The parameter setting of mobile phone MMS is incorrect;

3. The size of the sent MMS exceeds 50K；;

4. The MMS outbox and inbox are full;

In addition to the above simple troubleshooting, you can turn off the phone or change it for testing, but it still can't be solved. You can contact the manual customer service for handling.