Android 5.1 is rolling out, boasting a number of new features and improvements over Android 5.0.

While it is a rather minor update, there are some worthwhile additions in Android 5.1 Here are the top five features.

1. Device Protection

Android 5.1 adds a number of device protection features designed to help users better secure smartphones. Device Protection will be automatically activated for users that use security methods like a PIN code.

The feature essentially makes it much harder for someone to break into the user's smartphone. An example is the fact that a device will stay locked even after being factory reset, unless the user's Google password is entered.

It's important to note Device Protection is only available to the Google Nexus 6, Nexus 9, and new Android 5.1 devices.

2. HD Audio Calls

HD Audio is finally supported in Android with Android 5.1. With this feature, Google promises "crystal clear" audio during phone calls, however it's important to note you will need a compatible device. Google mentions the Nexus 6 on T-Mobile or Verizon in its blog post. Users will also need a strong enough signal to be able to carry the improved audio.

3. Priority Mode Turned Off Until Next Alarm

Priority mode was added as a feature in Android 5.0, essentially allowing users to set what types of notifications should be allowed to make audible sounds. Priority mode is activated for a period of time, and is often used when users are asleep. Now, users don't have to manually switch off priority mode, and it can be set to turn off automatically when the next alarm goes off.

4. Quick Settings From Lock Screen

In Android 5.0, users were able to drag down from the top of the screen to open a drawer of quick settings. In Android 5.1, this can be done from the lock screen, even if the device is protected by a PIN code. This enables users to quickly activate the flashlight, Wi-Fi, Bluetooth, and other features.

Users can also hold on the icon of a quick setting in order to remove it from the drawer, adding an extra layer of customizability.

5. Smart Wi-Fi Connections

Android 5.1 devices will also now remember which Wi-Fi connections are perhaps not so strong, and will not automatically connect to those signals.

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