If you take advantage of jailbreaking your device to install apps from cydia or customize your iphone or ipad in a way that Apple does not allow then this is great. You can upgrade your iPhone or iPad software to the latest update of the firmware which is 4.3.2. All you need is Redsn0w for Windows or Mac. The links are below, also you will need the latest firmware for your device. I put below a link to a website from felixbruns which will allow you to download quickly and easily the firmware for your device.
Sadly this is not for your iPad2 ( No! Jailbreak For YOU! ) – Seinfeld joke
CLICK BELOW TO DOWNLOAD THE FIRMWARE FOR YOUR DEVICE