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Originally Posted by Rena F I have an att blackberry curve 8300 that someone gave to me but i have a tmobile sim card. when i follow the steps to unlock the phone, it keeps saying no valid sim card. what do i do next? please help, i need a phone before i go to mexico! HI you can easily unlock your Blackberry curve 8300 mobile from AT&T network lock using sites like Classicunlocking.com here they render unlock code for all mobile models at reliable cost along with free instruction about how to input code in your mobile to unlock it ..After unlocking your phone you can freely use it with t-mobile sim card ...
You call AT&T and ask them about unlocking the phone. Or you go and pay some local dude $20 to do it for you.
Tmobile Sim card but Att phone? I have an att blackberry curve 8300 that someone gave to me but i have a tmobile sim card. when i follow the steps to unlock the phone, it keeps saying no valid sim card. what do i do next? please help, i need a phone before i go to mexico!
Tmobile Sim card but Att phone?
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