How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Mac)

How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Mac)

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ZoeSouls - February 19, 2013 at 1:54am
I'm having the same issue as Redtowner. I have a factory unlocked 3GS (serial ---947) with baseband 15.16.08 and want to downgrade my baseband back to 5.13 so I can get my imessage and picture messaging capability back and so my signal will stop spazzing. Anyone offer any advice?
ZoeSouls - February 19, 2013 at 1:59am
Forgot to mention that I'm on iOS 6.1.