A:AnswerYeah, you will have to buy an adapter to be compatible with the IPad. I would recommend the USB-C to Headphones and Charger jack on Amazon and it works great
A:AnswerMost Ipad are open/unlocked, but it's up to the phone carrier. Only because a lot of cell phone companies/ carrier, already carry the newest iPad. That they sale directly, with phone plans or mobile data services.