What is this Samsung Galaxy S3 Indicator Icon?

[Erica Sommermann]

I'm having troubling finding out what one of my Samsung Galaxy S3 indicator icons means. In the screenshot attached here, it's the 3rd one from the left. It is shaped as a rectangle and looks like it has a small face in it, with an orange arrow pointing in one direction and a green arrow pointing in the other direction.

Any ideas? Thanks in advance!

 

[HNNNNNGHHH]

It's likely from a carrier related application, as far as I'm concerned. Try to see if an app in the notification page is making the icon appear.