SF78 Dual Nano SIM Card Connector JAE Electronics SF78 Dual Nano SIM Card Connector can host two nano-SIM cards and install them into a single device. Nano-SIM cards are replacing micro-SIM cards as mobile devices become smaller. Users require multiple SIM cards for work and personal accounts housed on the same smartphone. The JAE Electronics SF78 Dual Nano SIM Card Connector is for feature phones, smartphones, and mobile routers.