How to get out of DFU mode
I've been reading tons of posts about users claiming they couldn't get their phones out of DFU mode and it made no sense to me that you HAVE to restore the phone once in DFU mode.
So i googled and came across this
Bear in mind it will only work if you have not attempted a (failed) restore.
to get out of recovery mode you can use Quickpwn 2.2
When in DFU, hold down the home button and the power button for about 10 seconds. If your phone is connected to your computer you'll hear a beep as when a USB device is disconnected.
Next just press the power button and your phone will startup at usual.
taken from here
Plug your phone in follow the prompt that tells you to turn off the phone and when you hold the power button to turn it on, presto, out of recovery mode. Takes a whole minute and a half.