My iPhone is far more than a phone for me. It's a mobile extension of my Mac.I am a die hard Apple fan and all the computing products I have ever owned were Apple. I suffered through until OS X. I really wanted an Iphone but, I don't use the phone enough to justify the plan's cost on any of the carriers (usually about $70 to $80/mo). I use the T-mobile pay as you go method and change the plan as needed and ran into a deal on a brand new HTC 4g phone (Mytouch 4g for T-mobile) that I just plugged my SIM card in, and I was off to the races. I use the phone rarely still but for $30/mo I get 1500 min talk/text + a limited amount of download or when I am traveling I bump that to the $50/mo unlimited talk, text, and web so, though I really wanted the Iphone, I will wait until I can find one that is plug and play for T-mobile with no contract just as I have now. The Android OS phone is also a really nice phone, very powerful and until Iphones are available for T-mobile it will do very nicely.
Not only is the iPhone the best phone I have ever owned it's one of the best computers I have ever owned. This device is rock solid. Rarely if ever crashes, and has amazing functionality.
And as a bonus the iPhone is also a great: Still camera, video camera, mp3 player, game console, video streaming device, ibook reader, and about a million other things.