T Mobile introduced latest design mobile phone T Mobile Wing. First, the good stuff. The Wing comes packed with an impressive arsenal of smartphone features, including Exchange ActiveSync and Direct Push support for corporate servers, Bluetooth, the mobile versions of Windows Media Player and Internet Explorer, a microSD memory expansion slot (conveniently located on the left spine of the phone), a two megapixel camera, and a quad-band GSM radio for placing calls on worldwide networks. There's no built-in GPS navigation or 3G (T-Mobile has yet to roll out its own 3G network), but you can get high-speed data over the built-in Wi-Fi receiver nice for anyone with a wireless home or office network.

All well and good but unfortunately, my review unit of the T Mobile Wing was slow as molasses. Programs and menus screens often took a few seconds to refresh, and buttons took too long to respond; on some occasions, I kept pressing an on-screen button with the stylus thinking the phone had frozen, only to have menus pop up a few seconds later.

The T Mobile Wing is also one of the first smartphones in the U.S. to ship with Windows Mobile 6, the latest version of Microsoft's mobile OS (the slim T-Mobile Dash just got a Windows Mobile 6 update of its own). That means more editing options in the mobile editions of Word, Excel and PowerPoint, tight integration with Windows Live messaging, and finally full support for HTML-formatted e-mail messages, which worked like a dream in my tests. Tapping out messages was a piece of cake thanks for the Wing's roomy, slide-out QWERTY keypad.

The advances made in the new version of Windows Mobile can be best described as progressional and far from revolutionary. The system allows users to set up and receive email instantly from Windows Live Hotmail and also gives users are access to MSN Messenger.

Microsoft has also invested a significant amount of time upgrading their current security features to make the service more appealing to corporate users. Those who will purchase the T-Mobile Wing are also encouraged to use Vista, so that lost or stolen data can be retrieved by the user, and limit the reliance on an IT professional