Why won't any of my apps open?

I just bought a new iPhone 4s from sprint a few days ago and already my apps won't open. When I click them the screen goes black for a second like the apps about to open but then just goes back to the home screen.

Try resetting your phone by holding down the lock button at the top, and the home button at the same time. "Slide to power off" will show up, but ignore it and keep holding down the buttons. The screen will go black but as long as the 2 buttons are still being pressed it'll turn back on.

If this doesn't work, you should try plugging it into your computer and syncing it to iTunes. If this doesn't work, you should call Sprint or the apple store.

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