If you received a recent e-mail or text about replacing your SIM card and/or received a SIM kit in the mail, the devices listed on your kit need a T-Mobile SIM to maintain service on the T-Mobile network. Once you swap your SIM card(s), you’ll continue to get the most out of our improved network. Your Sprint account will remain the same, with the same price, plan, and billing experience. You also get immediate access to network-level scam protection with Scam ID and Scam Block, along with free Caller ID, all of which you can activate in T-Mobile’s free Scam Shield app. Learn more here. You can follow the instructions included in the kit to change out your SIM card(s).