Palm has released a free upgrade that adds the new Microsoft Windows Mobile 6 Professional operating system, HSDPA support, AT&T services, and other enhancements to your Treo 750 device.

Key enhancements of this WM 6 upgrade include:

+ Faster downloads with High-Speed Downlink Packet Access (HSDPA) – Get faster access to large attachments, streaming video, and more.
+ Additional email support - Send and receive HTML emails with tables, bullets, and colored text intact. The “smart filter” for contact search has been updated so you can search for emails stored on your company’s Exchange Server3. Even send an out-of-office message from your device.
+ Windows Vista compatibility - Easily sync your smartphone to your Windows Vista PC, via the Windows Mobile Device Centre (WMDC).
+ Better security and IT policies - Remotely wipe devices and SD cards clean in case of loss or theft. Compatible with Exchange Server 2007 Activesync policies.
+ Internet Connection Sharing - Utilize your smartphone capabilities by using your phone as a high-speed wireless modem for your laptop. It’s easy to set up and even easier to connect. Just click and go!
+ Email hot keys - Work in the fast lane with single-key access to your most frequently used email functions. Press “R” to reply, “A” to reply all, or “M” to move to one of your folders.
+ Email Inbox search - Find that important document or email. Automatically search for attachments, senders, or keywords by simply typing a few letters while you’re in your email inbox.
+ Access Sharepoint - Get what you need then get going. Access documents stored on your company’s SharePoint servers via links in HTML emails.
+ Voice Command via Bluetooth wireless technology - Get more done while you stay hands-free
+ USB cable charging- Charge your mobile device using a USB cable or cradle connected to a computer

Visit Treo 750 Updater 2.25 homepage for complete details and instructions. You can also download the user guide for this upgrade here. (14.6MB, 352 pages)