Stay connected to your e-mail, calendar, and contacts. Be productive read and compose Microsoft Word Mobile files, make Microsoft Excel Mobile charts, and view Microsoft PowerPoint presentations. Find what you need quickly and easily including business listings, maps and directions with Windows Mobile’s powerful search and filtering features. Get access to corporate networks for data and documents stored on file shares and SharePoint sites. Fit your style with a variety of designs ranging from touch screen devices with slide out keyboards to sleek full-keyboard smartphones or compact flip phones. Now receive HTML e-mail support, improved security and encryption, greater integration with Microsoft products including direct SharePoint intranet access from e-mail links and superior connectivity to Windows Vista. Check out this link. Also if you are upgrading on a tmobile phone the upgrade is free at tmobile.com Good luck.http://www.microsoft.com/windowsmobile/6/default.mspx