At present time, the Galaxy Watch Smartwatch (LTE) is supported by the following carriers: AT&T, Sprint, T-Mobile, and Verizon. For more information, a link to the original specifications as listed on Samsung.com has been provided. We recommend that you contact the carrier you intend to use for details, as well. https://www.samsung.com/us/mobile/wearables/smartwatches/galaxy-watch--42mm--midnight-black--lte--sm-r815uzkaxar/ ^Thomas