Yet another success story.
My phone is a T-Mobile HTC Sensation running Android Revolution 6.7.2. That's a dual-core something-or-other. http://www.gsmarena.com/htc_sensation-3875.php
For whatever reason, this phone normally accumulates lag....
The battery cover in the Amazon picture is clearly not for a MT4GS, but maybe it's just the stock photo they use for all this company's batteries.
Anyhow, for $20, I took a chance.
And next stop ... how to unlock it?
The Waze app also seems OK.
Since this plan was already officially announced a few days ago, you can find out pretty much everything you want to know about it in 10 minutes on tmobile.com.