[Moto G 2015 General] rahul9999:
Hello Friends,​

Starting with Android 5.0 Lollipop, Google introduced a new Smart Lock system that gives you various options to help speed up the process of unlocking your phone when the device detects that it's in a secure environment. One of these options, called "Trusted Face," is functionally identical to Apple's new Face ID system — just wake your phone, look at it, then swipe to unlock. All without having to scan your fingerprint or enter your PIN.

To be clear, Apple's new system uses a few extra sensors that Android devices simply don't have at the moment. Namely, a flood illuminator and a dual camera setup that includes an IR sensor, which means the iPhone X can get an accurate 3D map of your face to prevent the system from being fooled by a 2D picture of the user. This won't be the case if you enable Trusted Face on Android, so it's not as secure. But if you're fine with that, I'll show you how to set it all up.

Step 1

Enable a Secure Lock Screen

First of all you'll need to make sure your phone has a proper lock screen set. This can either be a pattern, a PIN, or a password. If you don't already have a secure lock screen method enabled, it's easy to set up .

Step 2

Find the Smart Lock Menu

Next, you'll need to find the Settings menu where you can adjust your phone's lock screen options, but this varies depending on what flavor of Android you're running. For most devices, head to the Security menu in the Settings app (or Security & Location on Android Oreo). For Samsung devices, head to the Lock Screen and Security menu in Settings instead.

Once inside the Security menu, find and select the "Smart Lock" entry. At this point, you'll be asked to confirm the pattern, PIN, or password that you use to unlock your phone, so take care of that, then move onto the next step.

Step 3

Enable 'Trusted Face'

From the Smart Lock menu, go ahead and select "Trusted Face." This will take you to a welcome screen that explains the feature, so go ahead and press the "Set Up" button, then tap "Next."

Important: This facial recognition is less secure than a PIN, pattern, or password. Someone who looks similar to you could unlock your phone.

Smart Lock doesn't store photos of you. Data used to recognize your face is kept only on your device. Apps can't see or use the data, and it isn't backed up on Google servers.

From here, you'll see a feed of your front-facing camera with an area circled in red. Make sure you're indoors in a well-lit area at this time, then line your phone up to where your entire face fits within the circle. Once you've done so, the red circle will be replaced with a blue progress bar while the system automatically scans your face. When the circle becomes entirely blue, you're all set to go, so tap "Done."

Step 4

Improve, or remove a trusted face

Improve your device's facial recognition

In the Smart Lock menu, tap Trusted face.

[*]Tap Improve face matching.

[*]Tap Next and follow the on-screen instructions.

Remove a trusted face

In the Smart Lock menu, tap Trusted face.

[*]Tap Remove trusted face.

[*]When asked if you want to remove the trusted face, tap Remove.

Step 5

Unlock Your Phone with Your Face

With everything set up, you're ready to unlock your phone with your face. When you wake your device, you'll see a small silhouette icon at the bottom of the lock screen indicating that the phone is looking for your face. Make sure to angle the phone to where it can see you, then this icon will change into an "unlocked" icon within a fraction of a second. At this point, you can simply swipe your screen to open your phone.

Considering that this feature has been around for over three years now, it almost feels like Apple's Face ID system is a direct copy with some extra security measures sprinkled in. The way you unlock an Android device using the Trusted Face feature is exactly how it works on the iPhone X, so you're getting a glimpse of the "next big thing" well before people in the Apple ecosystem can.

What are your thoughts on Apple's Face ID compared to Android's Trusted Face? Obviously, the former is much more secure, but the latter was years ahead and stands to catch up with the addition of a few hardware modules.

You can also use this feature if you're running custom ROM's..

I can confirm that its' working on my Moto G 2015 (Osprey) running Unofficial Lineage Os 14.1 with latest OpenGapps Nano

Below mentioned device are tested with above method & this method works fine with this devices.

Moto G 2015 [Osprey] - Running Unofficial Lineage Os 14.1 with latest OpenGapps Nano

Moto G Turbo 2015[Merlin] - Running Stock Android 6.0.1

Moto G 4 Plus [athene] - Running Stock Android 7.0

Moto X Play [Lux] - Running Stock Android 7.1.1

Lenovo Vibe K5 Note - Running Stock Android 6.0.1

I know that many of you have already aware about this feature & maybe you're already using this feature, but guys there are still many people who are not aware about this.

Hope this guide will help them to take a advantage of this feature & also show - off their friends who all are using IOS ;) ​