No PDA in world is as good as iPhone.
iPhone has full office support including MS Excel with all the formulas even complex ones. You can view, create and edit.
You can, not only view them can create a spreadsheet and edit your current files.
You can transfer all your files,audio,video wirelessly to iphone and from iPhone to computer from anywhere.
You can make Keynote presentation right on iPhone and connect to projector to deliver presentation. No need of a computer at all.
You can make conference call using VoIP. I make international VoIP calls on it with Live Photo Streaming. Even super computer cant do this. And Blackberry cant even dare to dream this.
You can stream webcam on iPhone and you can can access 30 computers at the same time and send all your document to them. You can even record the voice.
It has the best internet interface. Wi-Fi works like a charm and most of the apps work even on 3G.
You can search anything on GOOGLE by VOICE Command no need to type anymore.
Another thing that comes handy for my projects is the ability to take "Screenshots" I visit a website and if i find something important I just take screenshot n later I can use them as reference. I can even convert all those screenshot in powerpoint presentation right on iPhone.
I have to sometimes make 3D interface of a plan to show all the dimension I can do it right on my iPhone coz it can make 3D stop motion movie.
Itunes has iTunes U which has amazing information and also video podcast that gives information from all fields.
And world know it has the best media player that plays MP3,MP4,MPEG-4,.MOV, M4P.
Video looks stunning coz it displays over 200,000 colors (Blackberry is capable of only 56,000 colors)
Its capable of sending MMS,SMS for free through apps like Photo Fling, iptexter.
iPhone is complete solution for business needs as well as entertainment no wonder it became the most favorite smartphone/PDA among business users and the highest selling phone in US. iPhone is only $200 with 2 year contract.
@Lowell
You didnt upgrade , you downgrade to Bold coz iPhone replaced Blackberry from the status of "most favorite business phone"
recent surveys shows iPhone has 77% satisfied customer where Blackberry has only 33%.
If iPhone is that expensive get iPOD Touch with $50 earphone +Mic Once you get earphone and mic, you can make calls through one free app "TruePhone" You can even have free conference call through this app.