How would I upgrade my smartphone to Windows Mobile 6.1?

[Guest gophergun]

I have an HTC Excalibur (T-Mobile Dash) if that helps. Is it possible?

[Guest awarner (MVP)]

If you want to keep your warranty (if you have one) then you need to wait for an official update to be released, but that may not happen.

If you would prefer top use an unauthorized ROM then xda developers would be one place to look.

Remember any unauthorized ROM updates are done at your own risk.