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? How do I change the wallpaper? How to insert the battery? How can I allow another computer or device connected using USB access files on my phone? Register your ROKiT Hub app Comments 0 comments Article is closed for comments.