*DATA PLAN MAY BE REQUIRED FOR USE The Blackberry 8830 is the first to have a dual-mode feature-it has CDMA and GSM technology. This BlackBerry 8830 is best suited for globe-trotting people without them ever changing phones. This phone is packed with push email support, PIM applications and built-in GPS and navigation. This 8830 will search for GSM signal once you inserted a sim card and will search for CDMA signal once removed. When using your Verizon SIM, your phone number remains the same for both CDMA and GSM networks. The reception on Verizon is good using the BlackBerry 8830. Voice calls have good quality with clear voice and loud volume. The 8830 also has an excellent Voice Command software that allows you not only to make calls via voice dialing, but also to check other things like battery status, signal strength and you donít need to pre-record voice tags. If you have a memo item on your list, you can bring up the menu in Memo and forward it via email. It also has the QWERTY keyboard for faster typing. *Please take note that this phone doesnít have a camera .