Use your compatible cell phone on the TracFone network with this TracFone SIM kit, which contains GSM and CDMA LTE three-in-one (nano/micro/regular) SIM cards and activation instructions to suit your needs.
My son wanted to use my old iPhone 5s and for $1 I was able to purchase a SIM card for TracPhone and bring it over. Very easy and he loves it. Couldn't be happier. Trac Phone is an easy way to keep control of your kids cell phone service.