iOS 4.1 / 4.0.1 to Fix iPhone 4 Reception Issue? | Redmond Pie
How to Downgrade iPhone 3G To 3.1.X « Smartphones :: Gadget Hacks
question] Trying to downgrade iPhone 2G to iPhoneOS 1.0 from 3.1.3 resulted in “Waiting for iPhone” and I'm noticing in this tutorial that the version shows up as 3.9 and mine showed
How to Downgrade your iPhone from iOS 4 back to 3.1.3 « Smartphones :: Gadget Hacks
3GS iPhone 4.2.1 tethered jailbreak and unlock that works without battery drain problem – @sepdek's
How to Downgrade iPhone iOS 4.2.1
iPhone 3G: effettuare il downgrade a iOS 3.1.3 | The Apple Lounge
How to unlock iOS 4.2.1 on iPhone 3G and iPhone 3GS with ultrasn0w | OSXDaily
question] iPhone3G 4.2.1 can't downgrade to 3.1 or 2.0 : r/LegacyJailbreak
How to speedup your slow iPhone 3G… downgrade your OS dum dum! - Peter Coles
Question] Found an iPhone 3G On iOS 4.2.1 What should I do with it : r/jailbreak