There is no arrears on the mobile phone, and the SIM card has been started, but I just can't send short messages, and the display has been failed.

If the mobile phone can't send short messages, you can troubleshoot according to the following conditions:

1. If the short message center number is set incorrectly, please reset the correct short message center number.

2. If there is no signal or the signal is poor, you can go to a place with strong signal to test.

3. The mobile phone has turned off the short message sending function. You can turn on the SMS function and try again.

4. Being blacklisted by SMS, you need to go to the business hall to remove the blacklist status before you can use it normally.

5. There is something wrong with the mobile phone, so you can change the test.

Tips: If it still doesn't work properly, please contact Unicom customer service.