IPhone 4 Japan Softbank unlock

IPhone 4 Japan Softbank unlock

Posted January 29, 2013 at 8:01am by sagiking · 11894 views
Hey friends! I have an iPhone 4 from Japan with the carrier SoftBank. I was using it with Gevey sim before, but due to my fault, I connected it to iTunes and updated both the firmware and software. Now, the phone is on the "factory screen", and I cannot even go to the home screen to see what software and firmware it has; but I believe it is upgraded to iOS 6.0.1 and firmware 4.12.02. Is there any way I can "downgrade" the firmware, and use the Gevey sim as before, because the factory unlock for this carrier is way expensive. I would really appreciate comments and suggestions! Thanks.


Answers (1)

1
Thatcher
Thatcher - January 30, 2013 at 9:00am
The simple answer is no. Once you have updated the firmware to a higher version the baseband is also updated. This means that even if you do downgrade the firmware your baseband will not accept the unlock.
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