Using iPhone as a speaker for iTunes
iPhone 4S, iOS 6.1.2
Hi Guidez,
The icon you are looking at is for AirPlay, which allows the iPhone (or other device) to play music remotely to an Apple TV or AirPlay enabled speakers. It does not allow you to play music from another device through your iPhone. See this article -
iOS: Use AirPlay to wirelessly stream content
http://support.apple.com/kb/HT4437
Thanks for using Apple Support Communities.
Best,
Brett L
Using iPhone as a speaker for iTunes