I am using this phone from 2 years.
The demerit of the phone:
1)Low-resolution camera
2)Display resolution is very low only 480p
3)Internal memory is very less(1gb user usable)
4)Phone is heating too much while using 3g.
5)Bad battery back up.
Bad phone dont purchase it.Sometimes the phone is automatically restarts. maximum you can install 10 applications.After that it will show insufficient storage.Price is so high but quality so poor instead of htc you should go to other brand.