Adding a car key to an iPhone requires going through the manufacturer's app and then pairing the phone to the car via NFC.

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? My name is Cori Ritchey, and I am an exercise physiology nerd turned fitness ...

Find out why meticulous care wasn't enough to prevent this nightmare Silverado engine failure, and the difficult ultimatum this owner now faces. A Chevy Silverado owner recently shared a nightmare ...