The Z9 Dual Comm 3G and built-in WiFi is the perfect solution for any mobile merchant. No WiFi available? Use the 3G GPRS networks. WiFi accessible? Save data usage and connect to WiFi. Using major 3G GPRS GSM networks, Dejavoo Prepaid Wireless plans eliminate the need for costly Gateways and make SIM and data management easy and flexible. Choose the plan best suited for the volume of business.