DFU mode is a comparatively complex method to restore. DFU mode will take you to restoration process no matter if your device is stuck or crashing again and again. But this way will erase all your data, so remember to backup your iPhone in the very beginning.

If you have installed the latest iTunes version, and the problem is still here. You can manually download the firmware file. If you barely use iTunes to manage your iPhone, your computer probably didn’t recognize the firmware file. You can disconnect your iDevice and restart your PC. For some unknown reason, some anti-virus programs will cause the malfunction of firmware file. You can try disabling your anti-virus software for a while, and run iTunes to update or restore your iPhone again.

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Overheating issues probably being a Hardware problems, you can run a 3D game then put your iPhone in freezer. One moment they were all there, but now they’re gone.

Press and hold the “Sleep/Wake” and “Home” buttons simultaneously. Release the two buttons when the Apple logo appears on the screen. Close all the apps and do not download any other content on your iPhone while the Update is on. Tried iOS update and restore, but it kept crapping out and never got to the actual restore feature.

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