How to use Trusted Devices in Android

Using Smart Lock is an easy way to mix security with convenience -- keep your Android locked unless you want it unlocked. Introduced with Android 5.0 Lollipop, Smart Lock includes the addition of what's called a Trusted Device. A trusted device is anything -- from an Android Wear smartwatch to a smart luggage tag to your car's stereo -- that can be connected to your phone via Bluetooth, or a programmable NFC tag that's been set up to unlock your phone when the two are close enough to communicate...