What is the DFU mode?Before we learn how to put your iPhone, iPad, iPod Touch into DFU mode, we should know what the DFU mode exactly is.
DFU (Device Firmware Upgrade) mode is different from restore mode. DFU mode bypasses the current OS installed and allows you to upgrade or downgrade your OS and it also used for custom firmware that is required for a jailbreak or SIM unlock and iPhone,iPad,iPod Touch data recovery. DFU mode is very likely for you if you are getting errors trying to restore in iTunes.
Note 1: Some people take DFU mode for recovery mode, both are very similar but not the same. Distinguish DFU mode from Recovery mode, in DFU mode, the iPhone screen backlight is not even on and the display is blank, while the Recovery mode has a picture that says connect to iTunes. If you have anything on your iPhone display, well, you are not in DFU mode.
Knowing what the DFU mode is, let’s start to enter DFU mode on iPhone, iPad, and iPod Touch with 2 methods.
Method 1 General Way to put Device into DFU mode
Second Step, hold the power button and home button for 15 seconds at the same time, then release the power button but keep holding the home button for another 15 seconds. The screen below will appear after finishing second step.
After you enter DFU mode successfully, the device screen will be black and iTunes will say it’s in recovery.
Method 2 DFU Mode Enter Way for iPhone, iPad and iPod Touch Data Recovery
In the early time, iPhone data recovery software only supported recover iPhone data from iTunes backup files, however, consider some iPhone users did not backup data with iTunes before, a new recovery way was created- directly recover data from iPhone, iPad and iPod Touch. Except iPhone 5 and iPhone 4S, other iPhone versions, iPad and iPod should enter DFU mode before perform data recovery.
Note 2: Following the method 1 to get into DFU mode may due to data loss, it is necessary to backup your data before enter DFU mode. Forgot to backup? It doesn’t matter, iPhone Data Recovery is professional program that can help you extract iPhone file and get all of photos back if you deleted your precious photos by accidently. And it works well with iPhone 5, iPhone 4S, iPhone 4, iPhone 3GS. Want to know how to get back deleted photos on iPhone, find deleted text messages iPhone and more? The answers in this blog.
Follow 3 simple steps to put your device into DFU mode
Step-1 Hold your device, then clicks the red “Start” button.
Step-2 Press Home and Power button simultaneously for 5 seconds. Don’t release buttons until the device screen turns to black
Step-3 Release Power button but keep holding Home for 10 seconds.
Having problem? Be patient and try again.
How to exist DFU mode?
Hold both the "Power" and the "Home" buttons at the same time for five seconds and then release them. The device should shut down automatically and reboot into normal mode. If not, hold both buttons for another five seconds.
==>YouTube video helps to learn how to enter DFU mode clearer.