iphone 5 ios 10.2 front camera not working

hello guyz,

i am using an iphone 5 i uptaded to ios 10.2 after updating the camera worked. few days later the front camera did not work but the back cam worked then i caught the camera icon and switched my phone off later after turning onn it worked. now again after about 5 days the front cam is not working i did every thing but nothing solved please anyone hep me..........