How do I know my China Unicom SMS center number?

1. General setting method: menu-SMS-SMS settings-SMS center number. 2, iPhone query, delete SMS center number Tip: Enter *#AAAA*BBBB# with the phone's "dial" and tap "Call" to find the SMS center number. To delete, please dial the command ##AAAA*BBBB#. 3. Tips for setting the number of SMS center on 3.iPhone: Enter * AAA * bbbb *+aabbbbbbbb # on the "dial" of the mobile phone, and tap "Call". A and b represent numbers. Because the numbers of SMS centers vary from place to place, you can consult local manual customer service to check the numbers of local SMS centers.