KB Reminder! How to enter iPhone DFU mode

  • Connect the iPhone to your computer and launch iTunes
  • Turn the iPhone off (hold down the power button at the top of the iPhone)
  • Hold down the sleep/power button and home button together for exactly 10 seconds, then release the power button
  • Continue to hold down the Home button until a message appears in iTunes telling you an iPhone in recover mode has been detected

from geekspeak Blog http://www.jbmga.com/the-blog/2012/6/12/kb-reminder-how-to-enter-iphone-dfu-m...