DFU mode stands for Device Firmware Update mode. It is a mode where the iPhone or iPod Touch will be made to force a restore of the firmware into whatever version of firmware it is given. Getting your iPhone or iPod Touch into DFU mode is somewhat tricky, and it may require some practice because timing is essential to get it to DFU mode and not into recovery mode, but don’t worry after this tutorial you will be able to enter DFU mode on iPhone or iPod Touch.
Please try this at your own risk, as we are not responsible or will not be held accountable for any damages done to your phone. Although there may be a resolution to almost all errors, please read the instructions carefully when downgrading so you won’t encounter any problems along the way. Follow the steps below to enter DFU mode on your iPhone or iPod Touch:
First, Open up iTunes, and plug in your iPhone or iPod Touch to the USB port. Now turn up the volume of your computer’s speaker loud enough so that you can hear it clearly.
Now here is where things get tricky. Follow clearly…Hold down the Home button (located on the front bottom of your iPod Touch/iPhone) and the Power button (top left for iPod Touch and top right for the iPhone with the screen facing you) simultaneously, until the screen goes black and the device turns off (past the red slider/slide to power off-screen).
Now let go of the Power button, but continue to hold the Home button. Your iPhone or iPod Touch should have turned off and the screen should not be on.
After around 10 or 20 seconds, you will hear a noise (beep/ding) from your computer’s speaker as if it had just recognized a new hardware device, now iTunes should recognize it in DFU mode.
After iTunes recognizes the iPhone or iPod Touch, let go of the Home button otherwise it will go into recovery mode and you will have to do the entire DFU process over again.
Just a confirmation that if you have put your iPhone or iPod Touch correctly into DFU mode or not, you will see the display is totally blank and you do not have anything on your device.
Now you can install any iPod Touch/iPhone firmware on your device via the iTunes SHIFT recovery method.