If you want to use this primarily as a phone, do not buy it! The voice quality is poor and it is difficult to use. It has no keypad, only a touch screen, so you cannot dial it while driving, walking, etc. You cannot see the screen in daylight. It is too big to fit into a shirt pocket, so you end up carrying it around in your hand.Now the worst part - apparently Samsung does not understand the concept of non-volatile memory. On 2 occasions my battery has run down, and both times the phone dumped all of it's memory. Contrast this to my old Nokia phone that I have not used or charged in a year - it still has all of it's memory contents.The PDA functions are difficult to use and master, and there is no manual to help. I have colleagues that have had their e-mail connections dissapear for no reason. There are intermittemt problems sending e-mail to addresses outside of my company's domain. The MS Office functions are worthless, since you have to constantly manipulate the screen - you cannot rescale the image on the screen. The web access is 10 times worse than dial-up.In short, stay far, far away from this phone - look at a Treo or a Blackberry if you want a Smart Phone.