My experience with Onesimcard.

[Grampa]

Originally Posted by OneSimCard

If you don't plan on traveling for the next 2 years, just call yourself once before it expires to get a new 2 year window.

Thanks for the clarification. However, you can't make that call to yourself if the balance has expired, so in practice, the card will cost $25 every two years whether you use it or not. That's not a huge amount, but it does need to be taken into account when comparing offers or computing cost per minute.