Google has officially launched Android 5.1 and they gave us factory image file to manually upgrade the Nexus devices such as Nexus 5, Nexus 7 2012 and Nexus 10. For new Nexus devices, we have to wait until to get update notification via OTA. Currently only T-Mobile users in the US may get OTA update.
Some notable changes in the Android 5.1 Factory Images:
- Quick WiFi and Bluetooth settings on notification bar
- Better support for Dual SIM, if the device has Dual SIM, the phone will now distinguish the SIM 1 and SIM 2 messages.
- Support HD Voice, some networks and some devices will have this feature.
- Improved stability of the system, strong RAM management
- Fix bug that causes the application closed unexpectedly
- Improved battery life
- Fix excessive use of Wi-Fi network
- The problem with the “OK Google” and notifications has been overcome