9300 can't send SMS.

Several abnormal situations of mobile phone short messages;

1, motherboard hardware failure, such as intermediate frequency, power amplifier, etc. If the call is normal, it can be ruled out.

2. The number of SMS center is set abnormally; In this case, it can be received normally but cannot be sent.

3. The Internet service provider has not enabled or restricted the SMS function; In this case, you can neither send nor receive messages. A few users have this situation, you can call the network service provider to inquire.

4. The 4.sim card has insufficient storage space, so the SMS function cannot be used; In this case, many mobile phones can't even enter the short message function, and they can't edit short messages. Just empty the SMS storage space.

5. The software causes the SMS function to be abnormal; It is rare in maintenance examples, and only after other reasons are eliminated can the software be rewritten to solve it.