When you are purchasing a service plan, you will be required to purchase a SIM kit. This kit will include the 3-in-1 SIM sizes that fit all cell phones. Punch out your correct SIM size when you receive your SIM kit in the mail. An LG Stylo 2 uses a Nano sized SIM Card. The correct SIM size in a 3-in-1 punch out is shown below. Next Steps...