I bought Unicom card, but I don't know my mobile phone number. The text message said I want to activate it. How to activate?

Unicom's mobile phone number activation method is as follows: 1, prepaid number: From September 1, 2003, new prepaid users need to register their real names first, and after success, they can activate their mobile phone numbers by dialing voice calls, videophones, surfing the Internet with their mobile phones, sending short messages, etc. (except for dialing the special telephone number specified by the state and Unicom customer service hotline); 2. Postpaid number: After the user completes the account opening procedure, Unicom staff will directly open the number for the user, which can be used directly.