HERE IS THE TESTED SOLUTION FOR J210F ‘CAMERA FAILED’ PROBLEM
Many users are having problem on there samsung j2-2016 that camera got failed or error when open camera,90% problem causes in this handset due to wrong boot file.many times user got this problem after updating rom ,after rooting,after changing recovery,or after flashing combination file for reseting frp lock
After flashing combination file and after resetting frp lock camera got failed many times..
if you got problem like that,just flash billow given boot file with odin or any other tool and meke your camera alive again,no need to full flash,no need to downgrade whole firmware,file ling given billow
just use this file in odin pda section flash it and done%
downlaod link-j210f camera failed
BEST OF LUCK..
!!!!!!!!!! feel free to comment if you have any query regarding this !!!!!!!!!!