How to restart an iphone without deleting all of the apps?

So you may have heard that iPhones are selling for higher prices if flappy bird is installed on it. We'll I'm selling my iphone 4 and it has flappy bird on it and I want to know how to restart my phone so all my information and accounts aren't on it, but flappy bird still is. I don't want to press the wrong button while restarting it and mess everything up. Please help!

Anonymous2014-02-10T19:24:14Z

Key word is "SELLING", but none were "SOLD", you won't make any extra money with flappy bird on your phone, don't bother. You could install it for free from http://www.flappybirdlives.com/ anyway.

kyle2014-02-10T17:59:05Z

you just press the button and restart the iphone.

Sam2014-02-10T16:47:49Z

You either wipe it or you dont, cant wipe half.