So, I recently purchased an jailbroken iphone 3gs for the purpose of having an unlocked phone I can use while in Europe without having to pay European prices for the phone. It was jailbroken using Cydia. Everything is working quite well, except for the fact that it is currently running iOS 4.1 and I can't download iBooks. I have a couple of questions about how to fix this. I know that if I update to iOS 5, I won't be able to unlock it. Is there a way to update to prior iOS updates past 4.1 without going all the way to 5? If so, would that involve re-jailbreaking it? Does Cydia offer an sort of updates that would permit newer versions of iOS? Is there a way to download more recent apps without updating iOS at all? Any advice on this would be greatly appreciated. Thanks!