A:Answerthey will work as long as you buy the seperate dongle which will make the normal port a lightening connector. Then they should be able to work with your phone.
A:AnswerIf you have an iPhone, yes. If not the jack has a different pin type than most headphones which results in a high pitched noise that the person you're talking to hears.
A:AnswerI let my brother use it and he told me that he was able to clearly communicate with the people he was playing with. Definitely cheaper than some fancy mic.