I'm on my second lumia 928 and even it doesn't function properly. gonna be on my 3rd before I know it. the first one was separating itself at one of the seams and made a horrid noise when the phone vibrated. then out of nowhere it stopped connecting to any network. tried various sims. Verizon had to replace it. my current 928 (which doesn't have nick or scratch on it, it looks like it just came out of the box) is beginning to separate again, and from time to time the touchscreen goes completely unresponsive and requires a force reboot.