Yes. Just sync your iPhone with your computer and download the 2.2 software. The new software should wipe out the jailbreak, so just re-install it.
Wish you hadn't jail-broken your iPhone
it will go back to factory settings....
Yes you can unjailbreak your iPhone by connecting it to iTunes and doing a restore. That will set it back to like it was when it came from the factory.
there a JailBreak for the iPhone 4s and below But Not iPhone 4S running 5.1 the Key is iPhone 4S running 5.1 has not been jail broken yet.
Adding Themes is only available to Jail broken, iPod Touch, and iPhone users.
Yes you can, but expect some iOS functionalities that are on, say the iPhone 5S won't carry over to the iPhone 4.
Jail-breaking an iPhone is illegal, but jail-breaking an iPod Touch is not.
NO you MUST have a Laptop Or a Computer
under settings switch to auto instead of T-Mobile. It worked for me, and I'm running 2.1 firmware, unlocked and jail-broken!
yes jailbreaking your Iphone/Itouch will not ever break the devices. the only difference with jailbroken iphone is that you have access to "Cydia" which is an app store made for apps that are not allowed on the Apple App store. I highley suggest using GreenP0isen.
No, that is not true. Jail broken iPhones still have access to the Apple app store. The only thing it will do is break your Apple warranty on your iPhone.
what it means is to add features to ur iPhone or iPod touch that u wouldn't normally have already installed without cydia.