Today at MWC 2015, we played with the ZTE Grand S3. ZTE's new flagship device lets users unlock their phones by looking at the front-facing camera. The cutting edge solution, called Eyeprint ID, works by scanning unique vein patterns in the human eye. See how it works in our brief hands-on video.

Swipe down from the top of the lock screen to bring up the eye scanner. You'll need to place the phone in front of your face so that both eyes appear in the box. It takes about 5 seconds from swiping down on the screen to unlock the Grand S3.

The ZTE Grand S3 is one of the first smartphones in the world to offer this solution. It eliminates the pain of having to tap a pin code or swipe a pattern on the screen. Another solution is unlocking with our fingerprints in recent devices. It can be found on Apple devices and even the new Samsung Galaxy S6. Will the eye-based biometric solution found on the Grand S3 be next step up?

ZTE Grand S3

We were impressed seeing this technology in person, but we had one question. What happens if we place a photo of the owner's face in front of the camera? According to ZTE, it won't work with a photo and it won't work even if you placed a video in front of the camera.

The ZTE Grand S3 has initially launched in China on January 17th, 2015. ZTE has not shared any specific dates or pricing information for other regions. ZTE's Grand series have sold more than 5 million units globally, including the Grand S, Grand Memo, Grand Memo 5S, Grand S2, and Grand X Max in the United States.

ZTE Grand S3

What do you think of Eyeprint ID on the ZTE Grand S3? Would you like to have this security option in your next phone? Let us know in the comments!