How to Put iPhone Into DFU Mode . This is a State that we can Put iPhone, iPad, iPod Touch into DFU Mode, can be Interface with iTunes without Loading iPhone Operating System or Boot Loader. Entering DFU Mode in iPhone, iPod Touch and iPad DFU Mode from Revocery Mode is different.
What is DFU Mode ?
DFU stands for Device Firmware Update and This Mode is a state that you can put iOS Device (iPad, iPhone, iPod Touch) into where it can Interface with iTunes, but that will not load the iOS Operating System or Boot Loader, as already told above. What is DFU Mode Used for, is very important if you are an iPhone, iPad or iPod Touch User.
In Other Words DFU Mode – If a restore using Recovery Mode doesn’t work you will want to use DFU Mode as a last resort. When placing your iPhone into DFU Mode it does not load the OS before attempting the restore
If you want to Change the iOS Firmware on the Device, This is the Primary Reason, users need to access DFU Mode on their iPhone, iPad or iPod Touch Devices. To Serve to Downgrade to Prior iPhone Firmware and Operating System as well, or to Customize Firmware that is required for a Jailbreak or SIM Unlock on Baseband.
Apple Released Download iOS 5 Firmware IPSW File, and you want to Upgrade iOS 5 on iPhone 4, iPad 2.1 or iPod Touch 4G Installed, and decide you would rather have a prior version of the Firmware on your iPhone, then you need to do this Through Enter and Put iPhone DFU Mode.
How to Enter & Put iPhone into DFU Mode
1. Connect iPhone, iPod Touch or iPad 2 to the Computer and Launch iTunes.
2. Now Turn iPhone OFF (To Do that you must Hold the Power Button at the Top of the iDevice)
3. Now Press the Power Button, and after Seeing Apple Logo on iPhone Screen, Hold the Home Button too with Power Button for 10 Seconds.
4. By Continue Hold Down the Home Button, release the Power Button, and Hold Home Button for more 12 to 15 Seconds.
5. After Seeing the iPhone Home Screen Blank, release Holding the Home Button. Now your iPhone DFU Mode is successfully done. See the Below Screenshot:
Important Note – When you See the Restore Logo with iTunes Logo or any Message on iPhone Screen, then your iPhone Is not in DFU Mode but iPhone Standard Recovery Mode. Again, DFU mode is signified by having a completely black screen on the device. If anything else is the case, repeat the steps above until you enter into DFU mode successfully.
This is the way to Put iPhone DFU Mode or Put iPhone Into DFU Mode. But It may take a few attempts to get your iPhone into DFU mode. Generally, I hold down both buttons then release the Home button just before I think the Apple logo would appear. If you are still holding both buttons down and you see the Apple logo you are holding them down for too long!
How to Exit iPhone DFU Mode
This is very simple to exit out of DFU mode, just Hold down the Home Button and Sleep/Power Buttons on the iPhone while Connected to iTunes. Hit the power Button as and this should reboot the device as usual.
Actually, this DFU Mode is specially used to Jaillbreak iOS, so that they can Install Cydia a third party application Store and Install Best iPad 2 or the Top iPhone 4 Themes and many applications and also to work with other Network Carriers.