did it work for u??

I cant open my front cam, the camera app hungs up ...i cant even switch to back cam through that app...however I can use my back cam from other apps like WhatsApp, but cant use my front cam even through those apps

still the same issue

I did as u mentioned bt now whenever I open camera app...a popup opens saying that you cant open more than one applications that uses camera, however I dont have any other apps open!!

there's no app called "camera test"!!