For any sysadmins or future sysadmins reading this though, do NOT put your service's 2FA on SMS. Do not use SMS for anything other than sending your grandparen

For any sysadmins or future sysadmins reading this though, do NOT put your service's 2FA on SMS. Do not use SMS for anything other than sending your grandparents a happy birthday message. It is trivially broken with a sim card hijack and we have seen many high profile incidents of people being hacked precisely through this vector.