When you turn on
HTC One for the first time, it will be automatically set up to use your mobile operator's data connection (if the
micro SIM card is inserted).
HTC One is available in either a 3G-only or 3G-and-4G/LTE version, depending on your region and mobile operator. You need a 4G/LTE plan to use your operator's 4G/LTE network for voice calls and data services. Check with your operator for details.