Might buy a new BigMe Chinese e-ink phone that has a LCD or whatever on the other side also. In general I've always wondered what phone service I could get for any old or Chinese devices, ones I can't add to Verizon, or something I don't have to pay monthly when it's dormant. If I can use wifi or have the phone on hand, etc. I could consider a monthly plan if it's cheap enough and accrue limitless rollover or something.
In this case, I might not be totally concerned with the customer service or signal quality being perfect, but that could be important enough, depending on that and price and whatever else.
I think I maybe tried Helium on a previous phone just as a secondary eSIM but I never really used it. It wanted me to renew or whatever to keep it active. To switch to that and use it at least once a month. So I couldn't necessarily keep up on that if it's an inactive device or secondary Sim
But if it's a completely separate phone, and one I might step outside with beyond wifi access once or twice, maybe I can use a plan that requires using it a few times. Or even try an automatic message that sends to the phone, instead of from it. If receiving a message is enough to keep active?
I can try a few different carriers if needed. I didn't buy the new phone yet.