This feature will be available on the Nexus 6 and 9 to start, but will be included on other devices shipped with Android 5.1. Despite a factory reset, the device will still require a sign-in with the original Google account. Google has also beefed up security for lost or stolen devices. And to make communicating even easier, High Definition voice calling will be available between Android 5.1 devices. If you own a phone that offers multiple SIM card ports, you'll be able to switch between them without physically swapping SIM cards. For starters, Quick Settings will now allow you to connect to a Wi-Fi network or Bluetooth device without opening another menu.
