Microsoft has today released the above Windows Mobile 6.5 upgrade guide letting users with Windows Mobile handsets know if they can or can’t upgrade their device.

As you can see, those with a Windows Mobile 5.0 or 6.0 are outta’ luck as there will be no 6.5 upgrade for them. Those with a Windows Mobile 6.1 phone aren’t in a much better boat as only some devices with 6.1 will be able to get an upgrade.

So in conclusion, if you have a Windows Mobile 5.0 or 6.0 cell phone you cannot upgrade to 6.5 and if you have a Windows Mobile 6.1 device you might be able to upgrade if it is available.

Read (Microsoft)