First of all, to use on Tracfone, the phone has to be a CDMA phone...meaning a used/unlocked Verizon phone. You get the SIM card for TRACFone...not for Verizon. That is how you get it working. Buy the SIM from BestBuy for Tracfone's Bring Your Own Phone program. You will want to go to Tracfone's site first and verify that it is a compatible phone. Even though Tracfone owns Straight Talk, there is no guarantee that the Straight talk phone will work on Tracfone.