"Research In Motion's quad-band BlackBerry 7100t with PDA capabilities is a GSM/GPRS (850/900/1800/1900 MHz) cellular handset that can make and receive phone calls in more than 100 countries around the world."
Mark Long, wireless.newsfactor.com has a review here or here.
Comment: This smartphone has a novel keypad that is well worth a look. I tried it, very briefly, and liked it a lot.