If you’re making a Genius Bar reservation for iPhone troubles, Apple wants you to try one thing before going in: Reset your iPhone.
This isn’t to insult your intelligence. We’re positive that Apple keeps track of what problems people come in with, and how it was remedied. Likely, they found that a major one was iPhone problems that were fixed by a quick reboot. This likely helps cut back on Genius Bar visits, saving time for both Apple employees and consumers.