Bushnell Cellucore 20 Dual SIM, Trail Camera, 20MP Resolution, Matte Finish, Tan 119904D The Dual SIM configuration of the CelluCORE 20 allows it to automatically connect to AT&T or Verizonwhichever offers the strongest cellular network based on your camera's location. No need to compare with network strength maps! And thanks to its optimized antenna" you know you're always getting the strongest cellular signal possible.