A:Answer Purchased mine about 3 weeks ago 9/21/2019, just opened package and activated today. The SIM card has an Activate by date printed on it when you open it, in my case it was 9/27/2021. I’m guessing at least two years unless the have old stock on the shelves. Porting over super easy too you just need your Billing Account Number and PIN and your good to go.