I have an unlocked blackberry storm 9530, and i want to know if i can put my old sidekick slide tmobile prepaid sim card in the blackberry storm so that it can be prepaid? Also, if i can, do i just keep buying tmobile prepaid cards? What if something goes wrong with the phone like the service do i just call tmobile and tell them i still have my old sidekick slide or do i tell them that i have an unlocked blackberry storm? And yeah one more. lol, someone sold me this phone, so how do i change there name with my name on the account? do i call tmobile and tell them that i got a new phone(do i have to tell them the specific phone?) thank you so much i would appreciate it if you ask answer all of my questions! 
thankyouuu.
thankyouuu.