which i'm using for at&t? i'm using my friend's verizon blackberry tour 9630 which is unlocked. i don't have a data plan, BUT i have the pay per use ability. i used to have an old at&t blackberry and i could access everything. this blackberry doesn't have a browser nor does it give me the option to send a multimedia message. i can't receive mms either. do i need to update the OS? or do i need to hook up the blackberry to a computer and add certain files? please help me out, it would be great to have step by step instructions on how to fix this 