Nubia mobile phone dual SIM card how to work?

1.Two FDD/WCDMA/TDD/TD-SCDMA SIM card:
When one sim card using data Internet, the other sim card can only be used for GSM.
2. FDD/WCDMA/TDD/TD-SCDMA SIM card + CDMA card:
When you use CDMA card for data Internet, the other card can only used for GSM; when you use the other card for data Internet, the CDMA card will be without service.
3. The dual sim card slot do not support two CDMA card at the same time.