The arete cable does not work with an iPhone as a mic. It works sometimes, but mostly not. When it's not working the remote is not working either.
Tested on 3 iPhone 4s and 1 iPhone 4.
However it does work with ipad, MacBook Pro, MacBook Air and Mac mini.
Even tested the app micCheck and confirmed that it doesn't work with iPhone but with ipad.
Tested with two other (cheap ones) pair of headset and both worked with my iPhone. Also confirmed by the app.
Edit: Kevin at Null Audio contacted me and he is sure that the remote does work, but he thinks that the problem maybe the 4-pin connector. Anyway, they are sending me a new cable and before sending it they are sending a video demonstrating it working on their products (ipads, iphones etc).
He also said to me that they've had been working on new lune and Arete cables. Great service!
I will test the new cable and share my impressions. Hopefully I received a faulty cable.
As I said earlier, the cable does work with ipad,ipod and macs. But not iphone. I'll send Kevin a video showing this, maybe they can identify a new problem.