It is not limited to the sim only. It works in other country and carrier. Here are the supported bands. Please check with your carrier. 4G BANDS B1 (2100) B12 (700) B17 (700) B2 (1900) B20 (800) B25 (1900+) B26 (850) B28 (700) B3 (1800) B38 (TDD 2600) B4 (1700/2100 AWS 1) B40 (TDD 2300) B41 (TDD 2500) B5 (850) B66 (1700/2100) B7 (2600) B8 (900) 5G BANDS n41 (2500) n66 (1700) n71 (600) n78 (3500)