I haven't done any mobile development. There were discussions at my old company (http://www.quitnet.com) to do a mobile app for people quitting smoking but we never got around to it. That and there were platform and compatibility concerns.
My phone is a grey razr, the sexy one all the kids have. I love it. I used to have the pocketpc which was too much computer and too little phone, overkill for me since I am surrounded by computers. I also switched carriers so I not know about sim cards.
I can figure coding stuff out, I have a comp sci background.
Right now my favorite thing about my phone is the fact that it automatically pops my mail & that I can run a port of mobile opera.
Oh also that it doesn't look like a brick.