Editors' Note: Jailbreaking and/or unlocking your Apple idevices will void your warranty. It is a complex process and is recommended for experienced, technologically savvy users. If you unlock or jailbreak your iOS device, you're doing so at your own risk. CBS Interactive does not accept any responsibility for any problem that may arise.
JailbreakMe is an app that jailbreaks (unlocks from a specific carrier) your iPhone. It allows full access to all functions built into the iPhone, as well as some apps that are not available through the App Store. JailbreakMe is itself not available through the App Store but is on many download sites including the authors' sites.
Before running JailbreakMe you should make a backup through iTunes so you can restore the iPhone to its original state should you have problems with JailbreakMe or any app installed once broken. Installing the app is as simple as running the download and then the phone is broken. You can configure your phone and apps using Cydia, then your phone has no ties to any provider or supplier. We tested JailbreakMe on both an iPhone 4 and a 4S and it worked cleanly on both.
JailbreakMe is probably the easiest and least expensive way to jailbreak your iPhone, but do make a backup before starting (and be ready to restore if you run into problems). JailbreakMe worked cleanly for us, and we were running apps only 5 minutes after starting the process.
JailbreakMe is the easiest way to free your device. Experience iOS as it could be, fully customizable, themeable, and with every tweak you could possibly imagine.
Safe and completely reversible (just restore in iTunes), jailbreaking gives you control over the device you own. It only takes a minute or two, and as always, it's completely free.
Please make an iTunes backup before jailbreaking.