Motorola is rolling out Google Android 5.1 Lollipop updates for its first- and second-generation Moto X and Moto G smartphones. The firmware update is also available for Moto E (Gen 2) 4G.

The new Android 5.1 Lollipop firmware brings various improvements to the Motorola smartphones, such a silent mode, fixes for Wi-Fi connectivity problems and frequent crashing of apps, high-definition (HD) voice calling, improved management of RAM, enhanced battery performance, and other bug fixes, reports Tech Worm.

Those who can now check for OTA updates on their devices include owners of Moto X (2014), Moto X (2013), Moto G (2014), Moto G (2013) and Moto E (Gen 2) 4G.

Users can check for updates by going to Settings > About > System Updates. Since the size of firmware update is large, it is recommended to download the update through a Wi-Fi connection. Tech Worm adds that users of Moto X and Moto G in the U.S. are already receiving the Android 5.1 Lollipop update. The firmware upgrade will be shortly made available for the rest of the world.

The release notes for Moto X (Gen 1), Moto X (Gen 2), and Moto E (Gen 2) are available on Motorola’s website. However, it is not available for Moto G (Gen 1) and Moto G (Gen 2) owners. Those users who are using a carrier version of the Motorola phones will have to wait longer until the update is released by the carrier.

Phone Arena reported that the Android 5.1 Lollipop update for Motorola Droid Turbo would be rolled out by middle of this month. As of this writing, the Droid Turbo devices are running on Android 4.4.4 KitKat. Motorola’s software engineer, Luciano Carvalho has officially proclaimed on Google+ that the Verizon-exclusive smartphone will not receive the Android 5.0 Lollipop update; instead it will be directly upgraded to the latest 5.1 Lollipop.