These three standards, CDMA 2000, TD-SCDMA and WCDMA, are 3G standards of the three major domestic operators, belonging to China Telecom, China Mobile and China Unicom.

The frequency bands obtained by China Telecom CDMA2000 are 1920- 1980MHz and 2 10-2 170 MHz, and its 3G system is based on FDD mode, obtaining 60MHz spectrum resources. Supplementary frequency bands: 1755- 1785MHz and 1850- 1880MHz. Its 3G system is based on FDD mode and obtains 30MHz spectrum resources. There is also the TDD standard: 1880- 1920 MHz, 206544. 2300-2400MHz。 Total * *: 40+ 15+ 100 MHz band resources;

The frequency bands obtained by WCDMA of China Unicom are 1920- 1980MHz and 2 10-2 170 MHz, and its 3G system is also based on FDD mode, obtaining 60MHz spectrum resources.

The frequency band obtained by TD-SCDMA of China Mobile is 20 10-2025MHz, and its 3G system is based on TDD mode, obtaining 35MHz spectrum resources.