Do I Need to Change My SIM Card? Happiness at Circles.Life Updated May 09, 2024 07:31 Follow Most current SIM cards support 4G/5G services. If you're consistently connected to 3G despite having a compatible device, consider upgrading to a 5G SIM for free here (mobile app link). Related articles Are there any charges if I change my 3G-only SIM card to a 5G SIM card? How do I know if I'm using a 3G-only phone or SIM card? What happens if I don't replace my Non-VoLTE 4G device? What Is VoLTE? How do I turn on / off roaming?