The rear side of an HTC dummy phone was recently leaked and seems to show a few differences from the other Thunderbolt photos we have recently seen. If you look closely you’ll see the words “With HTC Sense” on the kickstand - and what formerly read “With Google”. The 4G LTE Verizon logo is missing right above hinting that this model may be an international version.
A very subtle difference is the absence of the actual speaker holes above the camera lens; either they don’t include these on dummy models or it is simply in a different place. This new model seems to have the camera’s 8.0 mega-pixels displayed as well unlike the earlier photos of the one to be released by Verizon.