To power off iPhone normally, hold down the Power button on the top until you see the “slide to power off” graphic. if your touchscreen is responding, and you can slide it. Let it turn off by sliding.
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There are many articles online talk about iPhone DFU mode. Many of them are hard to understand, some are even worse – give you the wrong definition. Here I feel I should explain to those of you who wants to know what DFU mode is and how it works.
In the process of hacking your phone, you may get into a state where you just can’t get the OS to boot. Or you may get errors when attempting to restore your device. Or you may be trying to
unlock your phone …