Yesterday we got a bit of a look at a case
for the yet to be announced HTC M8, also known as the One Two and One+. Keeping in mind this is a rumor based on rumor, however the case was shown to have two decent sized openings on the back side. Presumably, one of those would be for the camera lens, but the other is where the speculation comes in to play. It was thought it may have something to do with a fingerprint sensor.