Today we are rolling out Android 5.1 – an update to Lollipop that improves stability and performance and offers a few new features like support for multiple SIM cards, Device Protection and high definition (HD) voice on compatible phones.
Whether you want to share your phone with a family member or better manage your mobile costs, Android Lollipop 5.1 now lets you use more than one SIM card on a device with multiple SIM slots.
With Device Protection, your lost or stolen device will remain locked until you sign in with your Google account – even if someone resets your device to factory settings. This feature will be available on most Android phones and tablets shipped with Android 5.1 in addition to Nexus 6 and Nexus 9.
High Definition voice calling is now on your mobile phone. Get crystal clear calling with HD Voice between compatible Android 5.1 devices like the Nexus 6 on T-Mobile or Verizon.
Android 5.1 Lollipop also provides enhancements such as the ability to join Wi-Fi networks and control of your paired Bluetooth devices directly from Quick Settings.
We hope you enjoy these tasty additions to Android Lollipop as you get more out of your Android phone and tablet.
Posted by Dave Burke, VP, Android Platform
Official Android Blog