A:Answer I use mine with an IPhone X, and it works great! I frequently leave the phone at home, so I got the GPS and LTE version, it is 10 extra a month but gives you a second line to receive calls on. So, you can take it off your taxes! Also, no need to make changes, they customer service rep will add it to your plan at the rate of 10 a month, and it won’t take a spot on your family unlimited plans!