What are the three circles in the front of the phone?

[NightxFall]

Just curious... what are the three circles in the front of the LG Ally? I know it doesnt have a front facing camera so im a bit curious as what they are for. I was told one was a proximity censor but not sure about the rest

 

[LickeyMong]

It's the light sensor

 

[Tman450]

Proximity, light, and motion.