What size of SIM does the ROKiT IO Pro 3D use? April 30, 2019 23:15 Updated The phone uses a Nano SIM (SIM is not included). See picture below. Related articles How can I use an SD Card? What size of SIM does the ROKiT IO 3D use? How can I update the software on my phone? Register your ROK Launch Control app What size of SIM does the ROKiT One use? Comments 0 comments Article is closed for comments.