The two lights on front up top ?

[66chevytruck]

I see that the one top right is low battery and when its charging.But i also see one top left but have yet to see it come on flash etc.What is it for or what is it?

 

[mudsloth]

That's the proximity sensor that turns the screen off when you put the phone up to your face.

 

[Boulder257]

Mud is right. It's not actually a light, but a sensor. You won't ever notice it do anything, but that is the reason that the phone screen "turns off" when you put the phone near a surface or, against your face during a phone call. It was designed so that you don't hit numbers or buttons while you are on a phone call.