Android 5.1 features:
- Multiple SIM cards support: Allows users to use more than one SIM card on a device with multiple SIM slots
- Device Protection: Keeps your stolen or lost device locked until you sign in with your Google account, even after factory reset
- HD voice calling: Delivers "crystal clear" calling with HD Voice between compatible Android 5.1
- Enhancements like: The ability to join Wi-Fi networks, and control paired Bluetooth devices directly from Quick Settings
Android 5.1 is now rolling out, although only Nesus devices are expected to be updated ASAP, while other devices might take a little longer depending on your OEM and Carrier.
Android