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Okayy so My Dad Gott Me a Blackberry, he bought it off of some guy at work, I made the accountt on the computer & Once I tried to sign in through my phone, it wouldn't let me..What do I do? Is it in the setting of the phone..or what? CAN SOMEONE PLEASE HELP..im new to T-Mobile so I'm Stuckk.!  -thankk youu