... in 1 PSTN,WIFI,HSPUA Router with 3G sim card slot Build-in Sim Card 3G router 1.HSUPA(850/1900/2100Mhz ... the unit is an HSUDPA module and SIM card. It's easy to use, just ... 3G External Antenna port: Optional. 3 in 1 PSTN,WIFI,HSPUA Router with 3G sim card slot3 3 in 1 PSTN,WIFI,HSPUA Router with 3G sim ... card slot