This is the ipad mini i bought on ebay .... APPLE iPad MINI 16GB, Wi-Fi + 4G Cellular (Verizon), 7.9in - Black & Slate #171220118059. i just want to know if i can switch out the sim and use in any country , using wifi or hooking up to a plan of this country or that country while travelling please... Can u just use any SIM for a phone ? Or which sims work for travelling ,in other words what options do i have SIM wise ! And what restricciones?