Do True SIM cards from 7-Eleven expire if unused for a while or if I stop paying?

Hi, anybody know if the True SIMs from 7-eleven lose the number/die if you go away for some time or stop paying?

In some countries, it can be 3 or 6 months.

Or is the only solution just to keep a balance and let it autorenew on current or reduced plan, or maybe just a small balance without a plan is enough, and plans can be reinstated on return?

Not optimistic i could find out from 7-eleven staff.

Thanks