I recently, factory resetted by android phone and installed my messenger. I tried videi calling my friend but i can't switch from back to front cam, it says "couldn't switch camera". So i tried opening my default camera, it still works but i can't find the switch camera button, even in other camera apps. I thought that i disabled my camera so i checked it in settings. I went to settings > apps > all apps but i can't find it anywhere in the list. Even in the very button the list where disabled apps are located. I'm sure i have a front cam cause i video call/selfie before.