Faint red glow on top of S3

[comshock25]

I just noticed this today... On the top of the s3, just right after the G of the logo where it used to be a black dot or sensor (whatever) now has a permanent faint red glow

Anyone know what it is?

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[bassmig]

I direct you to this thread.

http://forums.androidcentral.com/samsung-galaxy-s-iii/199628-red-light.html