Why can't Samsung e400 Unicom send short messages?

The reasons why mobile phones can't send short messages are as follows:

1, the mobile phone number is in arrears, and it is in an abnormal state such as recharge period/lock period/shutdown.

2. The SMS function is not enabled on the mobile phone. You can contact the local manual customer service or go to the local business hall to open this function.

3. If the SMS center number is not set or set incorrectly, just reset it;

4. The signal is weak, there is no signal or the battery of the mobile phone is insufficient, resulting in that the information cannot be sent normally;

5. Because the system is busy, especially during the peak period of sending short messages on holidays, it is suggested that you try again later or avoid the peak period of sending short messages;

6. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number;

7. Whether the SMS sending box is full;

8, change the phone to test.

In addition to the above simple troubleshooting, it still cannot be solved. You can take your mobile phone card to the local business hall for testing.