For a long time I resisted buying an iphone, even when I had the chance last year when I was due to upgrade my phone. They looked good, did fun things, and to me they were just a very good gimmick, so I had a normal phone and my ipod. When my ipod died I bought an ipod touch, my life was about to change. 
The Ipod touch did cool things and so did the apps you could down load. Three weeks ago I treated myself to an iphone, my life has changed. I can check my emails on the go, check my calanders, do twitters and facebook, take pictures and video and loads more. But it is these Apps that have changed my life. I can now check my eBay accounts on the go, check PayPal on the go.
When I am product sourcing I can just scan a bar code and it brings back the pricing information so I can see if there is a profit to be made. WOW. I can say hand on heart that the IPhone has given me an extra 2 hours a week, yes honest 2 extra hours.
So if you are looking for a new phone and are in Internet marketing then the iphone is a real must for you and your business.