[youtube]http://www.youtube.com/watch?v=6dxM3ADO30M[/youtube]
What you see above is a method of rewriting baseband- the phone directly from the chip on the motherboard, a complicated method that you should not try unless you have advanced knowledge of electronics and hardware. The video explains the method on one iPhone 3G cu 3.1.3 firmware si baseband 05.12.01, so no chance to do software decoding for now, so this is the only method to be able to decode your phone, but I don't know how many service technicians GSM from Romania have the necessary knowledge to do such an operation.
As you can see, everything unfolds iPhone- the chip is removed and reflashed using a computer program, then it is inserted back into the phone, but this whole operation is very complex and if you don't know how, you will surely damage the phone. The video above details this operation on a iPhone 3G which is downgraded from baseband 05.12.01 la 04.26.01 and unfortunately I don't know if the operation is also possible for iPhone 3GS.
One thing is for sure though, MuscleNerd for the Dev Team a confirmed that the method is correct, so if you know how, you can learn it, and I'm sure there are clients who want a baseband downgrade.
