Did you know you can add more fingerprints to your phone? Here's how

Make unlocking your smartphone even smarter by preparing for those times when you have sticky or wet digits

Most top-end smartphones, and even some low-end models, come with a fingerprint scanner these days.

Last year, the fingerprint sensor stopped being a gimmick and started becoming one of the most useful parts of a modern smartphone. From keeping your phone secure to authenticating payments, the one-touch fingerprint sensor has numerous advantages over a pin code - but only when it works. There are few things more frustrating than repeatedly touching your finger tip only to have it refuse to unlock.