So What is the Straight Talk Reserve?
Initially when you activated a Straight Talk phone you had to put in a new Card every thirty days or whenever you ran out of minutes. The problem was if you put in a phone card before your previous one expired then you would lose the time left on your previous card.
Now Along comes Straight Talk Reserve
You can add a Straight Talk Card to your Reserve and Straight Talk will add your card when your previous card expires. It will not eliminate the remaining time on the card you are currently using. When adding a spare card to your account be sure you are adding it to your Reserve and not directly to your account.