These are the supported frequency bands for the X1600 LTE Socket cellular links:
LTE-FDD Bands: B1, B2, B3, B4, B5, B7, B8, B12, B13, B14, B17, B18, B19, B20, B25, B26, B28, B29, B30, B32, B66
LTE-TDD Bands: B38, B39, B40, B41, B42, B43, B46, B48
WCDMA Bands: B1, B2, B3, B4, B5, B6, B8, B19