no matter what kinda of hypersim u use, it should be fine in nyc.
if let me choose, i'd like to have mr. sim and xsim both 'cause the prices in China are much cheaper than US.
either one doesn't work well in nyc so u could use another to replace it just in case.
全世界最破的subway是在nyc
so 沒有任何通訊設備除了police & mta channel
before i took the subway i turned the phone to flight mode so much easier regain the signal when i was back on the street.