lephone circuit board

[Jake11]

Dear Friends,
I would like to inform you that visibly having a front cam and the ear speaker, there are two other none visible hole from the inside on th circuit board. one is a focus lense and the other also. as if someone is watching us from distance. Can anybody get me the cuicuit board plan of lephone to know what the use of the lense(not camera)

Thanks

 

[gilezzz]

Watching us from distance?? Hey, check what you smoke, man. My wild guess is proximity sensor (turns off the display when you put the phone to your ear) and display brightness sensor (adjusts the brightness according to the lighting of the environment).