SIM card type：Nano-SIM, single card
4G network：TD-LTE(Mobile), FDD-LTE(China Unicom, Telecom)
3Gnetwork：WCDMA/TD-SCDMA/CDMA
2G network：GSM
Support frequency bands：
2G:GSM900/1800MHz
3G: WCDMA B1/ B8, TD-SCDMA B34/B39,CDMA BC0
4G: LTE TDDB34/B38/B39/B40/B41,LTEFDD B1/B3/B5/ B8
