T-Mobile Dash
Windows Mobile 6 improves search, security, and support. (Credit: T-Mobile)

It's freebie Friday for T-Mobile Dash or MDA users running Windows Mobile 5 from their handsets. The carrier is offering free downloads of the Windows Mobile 6 platform from its Web site, and all you have to do to get them is enter your 10-digit phone number.

The updated mobile platform officially launched in February at the 3GSM conference in Barcelona, Spain, unwrapping improvements to search, security, and Windows Live support services. Visit CNET News.com for full coverage of the new platform's launch and CNET.com for Bonnie Cha's thorough review of the interface and features.

Jessica Dolcourt reviews smartphones and cell phones, covers handset news, and pens the monthly column Smartphones Unlocked. A senior editor, she started at CNET in 2006 and spent four years reviewing mobile and desktop software before taking on devices.