Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 1Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 2Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 3Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 4Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 5Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 6Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 7Apple's Touch ID fingerprint sensor explained: Here's what you need to know - photo 8