I can confirm with absolute certainty that this is correct all phones that come from apple weather paid for in full or paid monthly with the exception of AT&T phone are automatically unlocked.

They work really well on Apple products but they are also very good. Ever since Apple bought out Beats by Dre the sound of their headphone have been on par or better than other headphones but to get a better opinion it would be better to go to YouTube and see the reviews as well