IPhone 3GS, baseband 06.15.00, upgrade to ios5
I have an Iphone 3GS(AT&T) which was jail-broken and unlocked using redsnOw/pwnage. The phone currently runs on version 4.2.1 (8C148a), baseband 06.15.00. I wonder if there is any chance I can upgrade to ios5 and then jailbreak and unlock it again. If this is doable, do any of you out there have a step-list to follow. Iím not super on this, but I managed the previous jail-break/unlock without problems. I appreciate all your help!