What size of SIM does the ROKiT F-One use? March 20, 2019 16:12 The phone uses a Micro SIM. See picture below. Related articles Setting up your Launch Control on your ROKiT One / F-One device What size of SIM does the ROKiT IO Light use? How can I use an SD Card? Why can I only see 2.4Ghz if my Wi-Fi connection has 5Ghz? How can I import contacts from the SIM card? Comments 0 comments Article is closed for comments.