iPhone stucked and iTunes won't recognize it? It's DFU time! :D

Once in a while, when you're toying with your iPhone (for example trying to jailbreaking or trying to unlock a locked iPhone), your iPhone can get confused and it will just stuck like the image on the left.  Worse, your iTunes won't recognize your iPhone too.

What to do?

Do the DFU thing.

1.  Shutdown your iPhone by holding the power button until it shows "Slide to Power Off".  Slide to power off.

2.  Make sure that iTunes is running and the iPhone is connected thru USB to your computer.

3. This is important.  Press HOME and POWER button at THE SAME TIME for 10 SECONDS.  After that RELEASE the POWER BUTTON *BUT* KEEP PRESSING the HOME BUTTON.

4.  Keep pressing HOME button, until iTunes recognize your phone, and ask you whether you want to restore it.

A pretty good video guide can be found here :
http://www.idownloadblog.com/2010/12/01/how-to-put-iphone-in-dfu-mode/

or search YouTube.  There're tons of these videos.