I can't be the only one in this position... I use a single BlackBerry, a 9700 provisioned on at&t. I've previously had Cellular One, Sprint, VoiceStream, Verizon, and T-Mobile; however this isn't a discussion on which carrier and why. They each served their purpose at the time.

What all of the carriers currently share is the ability to use BIS + BES functionality on a single device. We all love this functionality, and it allows you to carry a single device for both personal...