Asus is pushing a new software update to the ZenFone 2 Laser (ZE601KL) over-the-air (OTA).

The update arrives with V21.40.1220.2153 and brings with it a bunch of changes to the smartphone.

Firstly, there are a couple of bug fixes. The first fix lets you increase/decrease volume when using the Line app in handsfree mode. Then there’s a fix for the volume burst issue while playing music.

Also, with the update, the Bluetooth performance has been improved and the GMS APK has received an update.

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And finally, there’s the Android security patch which adds an additional layer of security to the handset.

As mentioned above, Asus has already started seeding the update over-the-air and it could take a week or two for the system to completely autopush the update to all the devices.

So, in case you haven’t received the update notification, head to Settings > About > System Update to manually check for the update.

Source: Asus ZenTalk