BEFORE DOING THIS make sure nothing else works because hard resting resets everything ALL YOUR APPS PICTURES, EVERYTHING. But this is how you do in if you can't do anything else.
Start with this:
1: Press and hold the home button
2: Press and hold the volume up key
3: Press and hold the power button
Then go down two (using the volume buttons to toggle up and down)
Press the power button to select
Then use the volume buttons to highlight the yes and press the power
When you get back to the menu, hold the power for a few seconds and wait.