I am new to WP8 and just purchased a 520 from the AT&T store. As I was exploring the phone, I clicked on XBox Music+Videos app. Under "collection", I tapped radio. I received a No Antenna message. I plugged in my headphones, and lo and behold, FM radio was functional!!!! I just learned that the AT&T version already has the Amber update and GDR2. What a great surprise!
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