What size of SIM does the ROKiT F-One use? April 30, 2019 23:18 Updated The phone uses a Micro SIM (SIM is not included). See picture below. Related articles What size of SIM does the ROKiT One use? Setting up your Launch Control on your ROKiT One / F-One device How can I check the IMEI number of my device? What size of SIM does the ROKiT iO Light use? How do I access my quick settings? Comments 0 comments Article is closed for comments.