If you lose a card, this feature lets you essentially 'turn it off' to foil thieves. But you can also use it strategically in other ways. Many or all of the products on this page are from partners who ...

Add Yahoo as a preferred source to see more of our stories on Google. When you can't find your credit card, it could just be misplaced. Or, it could be stolen by someone poised to rack up charges on ...

Technology that allows hotel guests to use their phones as room keys is expanding, taking aim at those environmentally unfriendly plastic cards. By Karen Schwartz The demonstration using the cellphone ...