thank you Stephen and all the others who provided useful info kindly rather than just telling me to count or to change my flight (you know who you are 😉)
Not sure of mentioned by anyone else here (haven’t read through) but I am in similar situation than you and have been happy with USCellular. I can put it on snooze for $3/month or activate for pay as you go as low as $5 depending on what I need. And when I want unlimited data/calls it’s $25/month.