ANY (activated or not) Sim from the carrier you wish to switch too.(or a way to replicate the carriers cert from one).You can read more on how this method works to force a carrier update to your device, here, on the Official Android dev site. **This is the process I took, you may find some of these steps are not needed but for the purpose or recreating my results, I'll be posting my exact process.***This has ONLY BEEN TESTED ON SNAPDRAGON BASED SAMSUNG GALAXY S21 ULTRA 5G SM-G998 U & U1, if you try it on a different model or phone you may (and likely will) receive different results!!!! *This does NOT trip Knox or Void your warranty and does NOT require a root or a paid service. Here's a free How-To on how i successfully Carrier/Sim unlocked my Samsung Galaxy S21 Ultra 5G running the NEWEST Android update on bootloader 5 (USQU5BULJ)released in January of 2022 that was carrier locked to Verizon and now fully Unlocked.
