Your card will last 70 days from the time of activation, after that the card expires and you will have to purchase a new card upon coming back to DR. The # will remain active for an unspecified period of time but at least 3-4 months it will be good from my experience. the only problem that I have had is that when I go back to DR after 70 days is that the phone will work but the caller ID wont, I need to go to a verizon store to have phone reactivated at no charge, same number and all, A 1 minute procedure.