What size of SIM does the ROKiT iO Light use? July 01, 2019 18:45 Updated The phone uses a Micro SIM (SIM is not included). See picture below. Related articles What size of SIM does the ROKiT F-One use? What size of SIM does the ROKiT iO 3D use? How can I use an SD Card? What do I do if I am having issues making a phone call? Register your ROK Launch Control app Comments 0 comments Article is closed for comments.