Yenra : Telephone : Microsoft Smart Phone : Sends and receives wireless calls and provides wireless Internet and e-mail access, music and video storage and playback, downloadable applications, and games.

Microsoft Smart Phone

Until recently, choosing a mobile phone was like buying bottled water: There was an abundance of brands and prices, but roughly the same thing inside. Not anymore.

To better serve busy professionals and computing-savvy young adults, software maker Microsoft has teamed up with telephone makers to introduce an array of advanced Microsoft smart phones that have transformed this water into a high-tech wine cellar of options. Aptly called "smart" phones, these high-tech handhelds offer a wide variety of features not found on mobile phones before, including wireless Internet and e-mail access, music and video storage and playback, downloadable applications, and games. Oh, they can send and receive phone calls, too.

With demand growing, manufacturers will nearly double shipments of smart phones by 2008. This is nearly twice the anticipated growth rate of phones with built-in cameras, according to technology forecasters InStat/MDR.

Tom O'Keefe is among those who have already ditched their old mobile phones. The chairman of Tully's Coffee Corp. uses his Motorola MPx200 with Microsoft Windows Mobile software to answer e-mail, monitor his calendar, check stock quotes, show off pictures of his kids and listen to music. He has even stored a video of his mother-in-law singing the national anthem before a baseball game on his phone.

"This phone does everything, and it's no bigger than my old cell phone," said O'Keefe, a self-described "gadget geek."

For those who aren't as tech-savvy, here are a few things to consider when choosing a Microsoft smart phone: