On any page on the iPhone that has a scrollable content, you can just tap the clock on the top bar that displays the clock (see attached image) this would scroll back the page to the top. Now this is really handy when you are deep down on the list of emails / sms’s or even when surfing the web. One of those things that makes you fall in love with iOS. Using any other phone becomes so much difficult after this. I had my frustrations with an Android where such small detailing weren’t refined.