How to put your iPhone in Recovery Mode

These are instructions on how to put your iPhone in Recovery mode
If you can't see the update/restore button, you will need to force your iphone into recovery mode.
Hold the "Home" button and the "power" button at the same time for about 30 seconds while your phone is connected to the computer
 
Description: http://newiphoneunlock.com/login/images/home_and_power.png
Keep Holding both buttons until iTunes detects your iphone in recovery mode.
Description: http://newiphoneunlock.com/login/images/recovery.png