I may have misunderstood your use case. I was thinking of the use case of traveling where you would buy a local SIM where it's actually two separate accounts. I

I may have misunderstood your use case. I was thinking of the use case of traveling where you would buy a local SIM where it's actually two separate accounts. In that case you can just switch the profile. You can have a work number and personal number or your home carrier and a local carrier if you are traveling. See: https://support.apple.com/en-us/HT209044 https://support.apple.com/en-us/HT209044