Here we go with another employee training rumor. Originally, the HTC Desire was supposed to appear on AT&T sometime in May/June timeframe, but it looks like T-Mobile is training its retail managers on the HTC Desire as well. The HTC Desire, as many of you may know, is a slightly better variant to the original Nexus One. Unlike the boring Nexus One interface, HTC makes it exciting with its Sense UI and a few other hardware changes that makes the Nexus One look passe.

There’s no word on availability, but as the source points out, if the HTC Desire shows up for T-Mobile, it will make T-Mobile the best carrier to sign-up with if you’re in the market for an Android phone.