I have a Katana II with Sprint. It's a decent phone. I like Sanyo phones, which is why I went with it in the first place. I bought it outright on ebay last October for $180 bucks. Recently, I've had problems with it. People on the other line can't hear me very well, and I fade in and out. This sucks. I went into the Sprint repair shop in Orem, UT and had them take a look. They couldn't fix it, so I am getting a replacement in a week or so. It only cost 37 bucks. Pretty good deal. Hopefully they'll let me keep my current phone and the new phone, so that I can take advantage of the Sanyo warranty coverage as well, and get two new phones for $37 bucks. This time I'll have a back up phone in case the new one breaks.
I'm giving my wife the Sprint line and taking her AT&T line, because the contract on that line has expired. With that, I'm going to buy the new 3G iPhone July 11th in Provo. I've also lined up buying an old iPhone from someone who is upgrading. I'm only paying $100 bucks for an old 8 gig model. This is cheap, considering he probably paid $600 for it a year ago. SO, when I get that old iPhone, I might jailbreak or unlock it and keep it as another back up.
(Speaking of which, listen to me rant about the 3G iPhone in the latest Geocentric podcast HERE)
I think I'm standing on top of the cellular industry right now. If only I could get a job at a cellular store.