Dale F., Dec 9, 2018 : Hi friends, I’m Dale F, OnePlus’ newest copywriter. Nice to meet you all! As this is my first time posting on the forums, I wanted to do something extra special. So, I thought I’d talk about my favorite part of the OnePlus 6T, Screen Unlock. Join me as I share the story of this futuristic feature - and I even speak to one of the engineers behind it. Let’s go! One of the OnePlus 6T’s most talked about features so far has been Screen Unlock. Allowing you to securely unlock your phone in as little as 0.34 seconds, the 6T’s futuristic in-display fingerprint sensor is the world’s fastest. But how exactly does it work? And why did we choose to include it in the OnePlus 6T? Read on to find the answers to these questions, and more. Why did we include Screen Unlock in the OnePlus 6T? Our mission has always been to share the best technology with the world, so it made sense for us to include this revolutionary tech in our latest flagship. In fact, as @Pete mentioned in his Screen Unlock post, we’d been testing it ever since the OnePlus 5T. However, the technology just wasn’t up to the standards of speed and reliability our users deserve, so we spent another year perfecting it until Screen Unlock was born. In the graphic below, you can see a comparison of the early sensor we tested and the current one that’s found in the 6T. How does Screen Unlock work? The OnePlus 6T’s Screen Unlock combines software and hardware to ensure it works perfectly every time. When a user places their finger on the 6T’s in-display fingerprint sensor, it sends out light to illuminate the finger, allowing the sensor to “see” the user’s fingerprint. During the testing stage, we discovered that green light gives the best results when it comes to recognizing fingerprints, which is why we went for this color. The graphic below explains how the 6T’s software and hardware work together to offer a great unlocking experience. What are the advantages of Screen Unlock? Screen Unlock is the natural evolution of fingerprint technology. The first Android phone with a fingerprint sensor was released in 2011. Since then, we’ve seen countless phones that feature a fingerprint sensor, usually located on the front or back of the device. While traditional sensors have served their purpose well, we believe that Screen Unlock gives unlocking your phone a whole new level of convenience. The 6.41 inch Optic AMOLED display used in the OnePlus 6T contains the Screen Unlock sensor, making it more than just a regular display. Now, you can access your phone in a quicker and more natural way. Plus, you can’t deny that Screen Unlock is really cool. When you first used a smartphone with a fingerprint sensor, did you ever imagine that one day it could be hidden in the display? The future is finally here, it seems. Screen Unlock gets even better over time The OnePlus 6T’s Screen Unlock isn’t just a high-tech sensor – it also uses sophisticated algorithms to improve over time as they learn more about the way you unlock your phone. To explain this in more detail, I called upon the wisdom of Yale Liu, software engineer here at OnePlus. “Every time a user successfully unlocks the phone with their fingerprint, the sensor also records areas of the finger that weren't registered in the initial fingerprint setup stage. This fingerprint data is then added to the data the phone already holds, making it more complete. So, every time the in-display fingerprint sensor is used, it gathers more data about the user’s fingerprint. This means that over time, the phone will unlock even faster. “The sensor’s algorithms are also able to figure out when the user’s fingerprint is different than usual – if their finger is wet or if they have a cut on it, etc. In these cases, once the phone is successfully unlocked, the algorithms add this new fingerprint data to the existing data to improve unlock speeds under these conditions in the future.” Use Screen Unlock like a pro Using a combination of hardware and software, Screen Unlock is primed to provide a consistently reliable and fast unlocking experience. But there's more you can do to improve your experience. Below, we share some tips on how to make your Screen Unlock experience an even better one. How about you? So, there we have it. We’ve explored in detail how Screen Unlock works and the history behind it. Now it’s your turn to tell us what you think about Screen Unlock. Share your experiences below. Thanks for reading! Never Settle.