What happened when Unicom's SMS was released?

Mobile phones can't send short messages for the following reasons:

1. SMS service is not enabled on the mobile phone. You can call 100 10 to contact customer service or activate this function in the local business hall.

2. No or wrong SMS center number is set, just reset it.

3. The signal is weak, there is no signal or the battery of the mobile phone is insufficient, which leads to the information not being sent normally.

4. Because the system is busy, especially during the peak period of texting on holidays, I suggest you try again in the future or avoid the peak period.

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

6. The mobile phone bill is insufficient, and you can't send text messages when you are in arrears.

7. If the SMS function of the mobile phone card is abnormal, such as entering the SMS blacklist, the SMS cannot be sent normally. At this time, you can call the local 100 10 to inquire.

8. If there is something wrong with the mobile phone itself, you can change it for testing. If there is nothing wrong with the card, you can go to the local after-sales store to test your mobile phone.