what providers does that work with?
Its not active yet, but I put my friends Cingular card in it and it worked. Also, T-Mobile sells the MDA which looks identical to it (except the arabic keys), so I'm sure it works for them too. Its Quad Band and works pretty much anywhere in the world. I would guess it would work with any company that gives out SIMM cards.
My verizon plan isnt up yet, so I just use it as a MP3/video player/WiFi internet access/Chat/Camera... basically everything BUT a phone.