how do I unlock my 3g 8Gigs Ipone to switch from AT&T to T mobile?

liveAndLearn

New member
Aug 21, 2008
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10 points for your answer
I have an iphone 3g 8 gigs and I wanna get some software to overwrite the firmware
Is there any free or cheap software to do so.
I need to know if the source code need to be adjusted and is it possible if I use a Java compiler to do so ?
I have no idea about the entire process
please provide me with all the steps
thank You in advance
 
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