China Mobile uses three spectrum bands of 1.9 GHz, 2.3 GHz and 2.5 GHz for 4G LTE service, which are respectively Band 39, 40 and 41. Similarly, China Unicom uses 1800 MHz, 2.3 GHz, and 2.5 GHz, namely band 3, band 40 and band 41. Among them, only band 3 (1800 MHz) is the FDD LTE.