For some time it seemed that if you wanted to be taken seriously as a business person, you had to have a BlackBerry device. Research In Motion — or RIM as the company was commonly called — built smartphones that were solid, had excellent QWERTY keyboards, they were secure, and they were the first devices to have PUSH email. Side note: PUSH email may be something many of us take for granted now, but there was a time when if you wanted it, you had to own a BlackBerry. Those of us on Pocket PC phones, Treos, or other phones…