Fuzzyband has been upgraded to support the latest baseband 05.13.03 in iPhone OS 4.0 Beta. The following instructions will only help downgrade iPhone 3G which is currently on iPhone OS 4 Beta with 05.13.03 baseband and older bootloader 05.08. This wont work with iPhone 3GS.
Let me clear this upfront. The following instructions will only help downgrade iPhone 3G which is currently on iPhone OS 3.1.3 with 05.12.01 baseband and older bootloader 05.08. This wont work with iPhone 3GS.
A complete step-by-step guide on how to downgrade baseband version 05.11.07 to 04.26.08 for iPhone 3G in order to unlock it with ultrasn0w on iPhone firmware 3.1.
