OnePlus Mobile Phone SIM Card Slot Type Specs

OnePlus 3SIM Card Slot Type SpecsDual SIM (dual stand-by)
OnePlus XSIM Card Slot Type SpecsDual SIM (dual stand-by) (2 slots - fits either 2 Nano SIM cards (DSDS) or 1 Nano SIM and 1 MicroSD card)
OnePlus 2SIM Card Slot TypesDual SIM (dual stand-by)
OnePlus OneSIM Card TypeSingle SIM