YouTube arrow in top bar???

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http://forum.xda-developers.com – Whenever I'm connected via Bluetooth, there is a blue arrow with what looks like sideways WiFi symbol. Its blue until I toggle it and it turns grey. Only shows up with Bluetooth though. Anyone know what it does? I toggle it on and off and it doesn't seem to change anything. More like a general question rather than a Note question, but since I use the Note I felt obligated to put it here. Thanks! Sent from my SAMSUNG-SGH-I717 using xda premium (HowTos)