It seems HTC has started delivering 8779 OS update to unlocked HTC Mozart users. Microsoft India employee Aviraj noted in his blog that he received 3 updates for his device and all the three were Windows Phone OS updates.
The first update was 7.10.8112.7 which brings in an option to apply the update without taking backup which will come handy for all of us to save time. The second update was 7.10.8773.98 from 7.10.8112.7. Then the third update 7.10.8779.8 from 7.10.8773.98. We are still not sure about what these updates brings in for the device. If you noticed any changes, let us know in the comments.