I can also add my very positive experience with GoogleFi. I have a U.S. phone number and wherever I go it automatically updates .....so far this year I have had seamless voice and internet access in US, China, Taiwan, HKG, New Zealand, and Australia. I get off the airplane or train and just by turning on the phone the new network is located. Also, I can receive and make calls to and from the states as if I was in the states ....this program has been the answer I have been waiting for after traveling internationally for years.