LPIII but as the OG Light phone..

I don’t even know what to search or I would but is anyone successful using the newest light phone as a “phone away from phone”? I’ve wanted to get a light phone since they came out but it’s moved away from what was intriguing about the original phone. I don’t want to move my SIM card around and I don’t want to get a light phone with a new number. Anyone successfully phone away from phoning?