Paying the bill on it is probably my most used function. I don't really use my cell phone all that much. We want to dump them off, but we are in the middle of a 2 year contract, so we're stuck with them for about another year. I never even bothered to check out 80% of the built-in programs it has in it. Installed NES and a few games in it.....never really play them on the phone though.
Next time I get a cell, if I ever bother with one again, it will be a basic one that will be ONLY a phone and no lame contracts. I don't need all that extraneous crap they put in cell phones these days. I just have no use for all those silly and mostly useless apps.