I lost the ability to use my rear-facing camera one day when I dropped it that had been Maybe 4 months ago from August 2016, so when I dropped it this time in August 2016 I decided I wanted to see the battery when I took the whole back off and put it back on and noticed a little computer piece was broken off and out I took the back back off of it the phone, and snapped it back in and noticed that that piece was actually right behind where my rear facing camera was. I turned my phone back on and Wawa I have my rear facing camera again so to everyone who can not use a rear-facing camera I suggest you take the back off of your phone to where all the computer parts and see if there is a round black thing behind your rear facing camera if not it must have fallen out when you dropped and cracked it open