The Xiaomi Mi Note Pro is a dual SIM phone with dual standby. It supports 1 micro SIM and 1 Nano SIM. Each SIM can support 4G, however only one at a time can support 3G/4G data - the active data SIM can be swapped dynamically.
Network -- Full Netcom, Dual SIM Dual Standby (Micro SIM Card x 1 Na-no SIM Card x 1or Micro SIM Card x 1 TF Card x 1,when one SIM card is using 4G LTE, the other only for GSM. Only Support one1 SIM card use CDMA network at the same time.).