What is Android smart lock?

Imagine having your phone unlock itself when you pick it up…
Sounds interesting right?

Hey, I am not quipping. It is now possible with an Android smart lock!!

One of Android’s best-kept secrets, Smart Lock, keeps your phone unlocked while linked with a reliable Bluetooth device or when it’s on your person. It provides a balance between security and a trusted environment.

When did your phone locks become smart?

Google Smart Lock, sometimes known as Android Smart Lock, was introduced with Android 5.0 Lollipop. The main benefit of using a smart lock is elementary! It solves the problem of always trying to unlock your phone. This lets the user specify circumstances in which it can safely remain unlocked for extended periods of time.

Additionally, this smart lock feature reduces the need to open a password-protected device as frequently in low-risk situations. In these cases, the phone can be accessed with a simple swipe. These circumstances include:

• Trusted locations
• Trusted devices
• On-body detection
• Trusted voice match
• Trusted face

Wait, Isn’t It Called “Extend Unlock” Now?

Here’s a twist. On several newer Android devices, you won’t find “Smart Lock” listed anywhere in settings.

Don’t panic. Google has been quietly rebranding the feature as Extend Unlock on many phones, including recent Samsung models.

The name changed, but the core idea hasn’t. It’s still the same trio of convenience features: trusted places, trusted devices, and on-body detection.

Why the switch? Google likely wanted a name that better reflects what the feature actually does. It doesn’t just “lock smart” — it extends the unlocked state under safe conditions.

So, if you’re hunting for Smart Lock on a recently updated device and can’t locate it, search “Extend Unlock” instead. Same engine, different badge.

This matters for IT admins too. If you’re auditing device settings or writing internal documentation, don’t assume every device in your fleet shows the same label. Depending on the OEM skin and Android version, your users might see either name.

For consistency, it helps to standardize your training materials and helpdesk scripts to mention both terms. A small naming footnote can save your support desk a surprising number of “where did my Smart Lock go?” tickets.

1. Trusted locations

When you are in your home or a trustable place, why do you need to unlock your phone each time? It’s unusual (though not impossible) that an unknown person will enter your living room and steal your phone. Authentication is not needed to access your device since the user finds the surroundings secure and reliable.

It is also possible to access your smartphone, which automatically pairs with your car’s bluetooth system. We can choose any bluetooth products we are confident with using this option. Thereby we won’t need to enter the passcode to unlock our phone when it’s connected to these devices.

3. On-body detection

Your smartphone is really smart!! It is aware of its state at all times, including when it is static, picked up, and even in motion.

When you take the phone out of your pocket or bag, you won’t have to enter your pin or passcode again if you already did so. You may thus keep the phone unlocked when it’s on you. It remains unlocked as long as you move, hold, or carry your phone. Thanks to the on-body detection feature!

4. Trusted voice match

We can utilize the trusted voice function together with voice commands. The smartphone will automatically unlock after voice detection is configured and a voice match is detected. This option will give you access to some of your phone’s functionalities but won’t ultimately unlock your phone all the time.

This feature can be enabled in settings:
Search for google assistant > Assistant settings> Hey google and voice match.

5. Trusted face

Do you recall the Face Unlock function? This feature, launched with the Android 4.0 Ice Cream Sandwich in 2014, enables face recognition to unlock your phone. With this Trusted face function included in Smart Lock, the phone uses facial recognition to allow users to engage with alerts and unlock them in a much more reliable way. Unfortunately, it was found that a picture of the owner made it simple to unlock the phone and made it unreliable.

Smart Lock Isn’t Just for Phones Anymore

Smart Lock’s usefulness doesn’t stop at your phone’s lock screen.

Google extended the same convenience to Chromebooks. Once set up, your Android phone can act as a key for your laptop.

Here’s how it works. As long as your phone stays unlocked and within Bluetooth range of your Chromebook, the laptop skips the password prompt too.

Walk away with your phone, and the Chromebook locks itself. Come back, and it’s ready to go. No typing required.

Setting this up takes a few steps on the Chromebook side: head to Settings, open Connected devices, and link your Android phone through your Google Account. Both devices need to be signed into the same account for it to work.

This is especially handy for hybrid workers who juggle a phone and a laptop all day. Fewer logins mean fewer interruptions.

That said, the same trade-off applies here as it does on phones. Convenience comes at the cost of a slightly wider attack surface. If someone has physical access to an unlocked, paired phone, they effectively have access to the paired Chromebook too.

For personal devices, this may be an acceptable trade-off. For company-issued laptops, it’s worth deciding deliberately rather than leaving it to default settings.

How to setup a Smart Lock on Android devices?

To install Smart Lock on an Android smartphone, follow the instructions below.

A Quick Note on Finding These Settings Today

Quick heads-up before you dive in: menu paths shift depending on your Android version and device manufacturer.

The classic route is Settings > Security > Advanced > Trust agents. That still works on many devices.

But on newer builds, you’ll more likely find it under Settings > Security & privacy > More security settings > Smart Lock (or Extend Unlock).

Samsung devices often tuck it under Settings > Lock screen > Smart Lock instead.

If neither path matches what you see, don’t get stuck scrolling. Use the search bar at the top of the Settings app and simply type “Smart Lock.” It’ll take you straight there, regardless of how your specific OEM has reorganized its menus.

One more thing: you’ll always need an existing screen lock method, like a PIN, pattern, or password, before Smart Lock options become available. Swipe-only lock screens won’t unlock this feature.

With that settled, here’s the general setup flow most devices follow.

1. Navigate to Settings > Security > Advanced > Trust agents and check whether the Smart Lock is turned on.

• On your specific phone model, the Trust Agents setting may be located in a different location. Tap the magnifying glass at the top of the Settings screen to look for Trust Agents.

2. Then search for Smart lock in security settings

3. Select Smart Lock, then input your fingerprint, pin code, unlock pattern, or password.

4. From this page, you can add Trusted locations, Trusted devices or activate On-body detection feature.

Is your smart-lock-phone secure enough to give you peace of mind?

Well, this is an argumentative question ?

It is true that, in addition to the smart actions offered, the smart lock may be vulnerable to attacks.

It is up to the end user to decide which circumstances are safe. They can choose any location in the world and a certain radius around it as a trusted location. For example, the users might think that their office or usually visiting coffee shop is secure.

After a certain point, this scenario can be dangerous because accessing a stolen phone is a piece of cake when it is unlocked. So, it’s not a smart idea for corporate devices. This risk is not worth taking for any device used for business purposes, especially one known to contain sensitive data. The same is true for your unlocked phone, which might be sensitive to the trusted device and on-body detection feature.

The on-body detection is suspicious since there is no way for the gadget to tell if the phone is on your body or if it has been stolen. The smart lock has not yet become smart enough to keep itself safe from theft. So, smartly using the smart lock relies on the end user.

An insightful guide to Android device management

How does Hexnode enhance the smartness of the smart lock?

UEM solutions like Hexnode enable granular control over the smart lock in your phone.

It provides a lock screen customization feature as well. Only smartphones with a secured lock screen can customize their lock screen (devices protected by a PIN, pattern or password lock).

The Hexnode for Work software needs to be updated on the device to modify the lock screen.

• Trust Agents for Smart Lock:
  • It is supported for Android Enterprise Device Owner (Android v5.0 & later) and Android Enterprise Profile Owner (Android v6.0 & later).
  • If this option is deactivated in the UEM console, this will stop trusted agents, such as Bluetooth or NFC-connected devices, from unlocking the device. It ensures more security for the devices in device owner or profile owner mode.

• Lock Screen Camera:
  • It is supported for Android Enterprise Device Owner (Android v5.0 & later).
  • This option can turn off the camera and face unlock functions on a secured lock screen.
• Lock Screen Notifications
  • It is supported for Android Enterprise Device Owner (Android v5.0 & later).
  • This feature can prevent notifications from showing on the secured lock screen.

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• Unredacted Notifications
  • It is supported for Android Enterprise Profile Owner (Android v6.0 & later) and Android Enterprise Device Owner (Android v5.0 & later).
  • Sensitive notifications with their contents hidden on the lock screen are known as redacted notifications. Lock Screen Notifications must be enabled to use this function.
• Fingerprint Unlock
  • It is supported for Android Enterprise – Device Owner (Android v5.0 & later) and Android Enterprise Profile Owner (Android v6.0 & later).
  • Through this option, the fingerprint option can be enabled or disabled to unlock the device.
• Face Unlock
  • It is similar to the fingerprint unlock option.
  • It is supported for Android Enterprise Device & Profile Owner (Android v9.0 & later).
• Iris Scanner
  • It is supported for Android Enterprise Device & Profile Owner (Android v9.0 & later).
  • This option enables/disables the iris scanner feature on the secured lock screen.

Closing lines…

The built-in Smart Lock function on Android phones was created to make life easier for the user. As the saying goes, “Everything has positive and negative consequences”, the smartphone remote functions may also change the game. So, use it wisely to avoid being tricked!