Why can't I send short messages when I change my mobile phone to Unicom number card? What is the reason?

If Unicom mobile phone users can't send short messages, they can try to restart or change their mobile phones to test whether there are any of the following situations:

1.

short message service center

Wrong number setting, please re-enter the correct SMS center number; 2. No signal or

cell phone battery

Insufficient motivation; 3. Because the system is busy during the holiday short message sending peak period, it is suggested to try again later or avoid the sending peak period;

4. The sending format is incorrect. Rugai

cleverness in trivial matters

Users send text messages, and the area code should be added before the number; 5. The short message sending time exceeds 24 hours; 6. The mobile phone shields the short message sending function; Step 7 be included

SMS blacklist

; 8. Insufficient quantity balance; 9. SMS

Inbox

Outbox is full.