I've been practicing Seon (a korean sect of Zen) for a number of years now, under Pohwa Sunim of the Joyge (could be spelling that wrong) order.
Zen is all inclusive, including non-inclusive. That includes that phone :).
The whole alter thing...meh. Even buddha said, basically, "hey, I'm just a guy who figured out how to live a happy life. Don't idolize me."
Playing music with your phone to meditate to? Meh. Irrelevant. What is relevant, is what people hear with. One could say, "well people listen with their ears, you idiot zen guy!" and I would simply remind them that corpses have ears too, but they can't hear!
Anyways, all in all it's kind of silly that it even exists, in my opinion.