Originally Posted by
staehpj1
Sure, but...
There can be issues with swapping sims between phones. It doesn't always work seamlessly. It may with some phones and some providers, but it isn't a sure thing. I have had good luck with swapping when I had a phone die and swapped the card to another in the distant past, but have heard of issues. Then you have the the issue of maybe having a phone with an esim. You are sunk in that case if I understand how they work correctly.
Sure, there can be problems but it's the only possible way to use multiple phones on a single-phone plan. What you suggested earlier doesn't work at all.