I know this is a two+ year old thread, but I had no idea that if you just let your phone sit in recovery mode, it would eventually revert itself back to normal. I'm in the middle of trying to jailbreak, forgot to backup before hand (silly me), and was looking for ways to get out of recovery mode. Then I noticed my phone just reset, go back to the Apple logo, and now it's back to normal. Overall probably 8 or so minutes passed.