Have a iPhone 3g or 3gs and want to upgrade to the latest iOS4.1 but cannot since you depend on a jailbreak and a unlock (ultrasn0w perhaps)....don't worry. Help is here thanks to the DevTeam again.
Head straight to 2 wonderful tutorials, thanks to iClarified.com. One is to Jailbreak and the other to unlock your 3g phone with iOS4.1.
To Jailbreak (with a custom iOS4.1 firmware) [For Mac] - http://www.iclarified.com/entry/index.php?enid=12363
To Jailbreak (with a custom iOS4.1 firmware) [For Windows] - http://www.iclarified.com/entry/index.php?enid=12115
To unlock - http://www.iclarified.com/entry/index.php?enid=4253
I tried both of the above and was able to successfully JB and unlock my iPhone3g and upgraded to iOS4.1 in the process.
