The BlackBerry was a popular item over the Black Friday weekend, as many major carriers ran cell-phone specials. Those deals are expected to continue until Christmas. The following is a BlackBerry buying guide for U.S.-based users.

Current High-End BlackBerry devices

BlackBerry Bold 9700 : Available on AT&T ( T) and Deutsche Telekom's ( DT) T-Mobile USA, this is the GSM flagship device in the traditional BlackBerry form factor. It has all the latest components and therefore the best performance from processor speed to battery life. Keep in mind that for high-speed packet access, or HSPA, the AT&T and T-Mobile USA versions are incompatible with each other's networks.

New BlackBerry Not So Bold

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