Prepaid SIM Card Activation Required - GreenIridium Prepaid Service cards are the best solution if you&';re working on short-term or seasonal projects and you know how much airtime you&';ll need. There are no contracts, no activation fees, and no monthly bills. You&';ll also receive alerts when you&';re running low on minutes or when your card is going to expire so you won&';t lose the time you have paid for.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.