When you turn on
HTC One max for the first time, it will be automatically set up to use your mobile operator's data connection (if a
micro SIM card is inserted).
HTC One max 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.