Google has released March Android 6.0.1 security update for Nexus range of devices with bug fixes and security patches. On Nexus 5X, this update (MHC19J) improves the overall stability and performance of the device. This update will also fix Wi-Fi and Bluetooth connectivity issues, Do-Not-Disturb next alarm disappearing issue and carrier-specific bug fixes on Nexus 5X.
Factory images of Android 6.0.1 March update are already available for download. As the OTA (over the air) update is rolled out in phases, It will take few days to get the OTA update on Nexus 5X. If you cannot wait for the OTA update, you can install it manually. Read on to know how it is.
– General slow/sluggish performance
– DND next alarm disappearing issue
– Bluetooth/WiFi improvements
– Carrier-specific bug fixes
How to flash Android 6.0.1 Update Manually on Nexus 5X
1. Install proper driver for Nexus device on your computer [Read this guide for details]
2. Install ADB and Fastboot tools on your computer. You can use Minimal adb and fastboot for this purpose [Read this guide for details]
3. Download factory images for Nexus 5X (MHC19J) [HERE]. Unzip the factory image you have downloaded and move all the contents to the same folder as the Minimal ADB and Fastboot installed on your computer.
4. Enable “USB Debugging” on your phone from Developer options
5. Now, boot your device into fastboot/bootloader mode. To do so, power off the device, press and hold both Volume Down and Power button together few seconds.
6. Now, connect your phone to your computer via a USB cable
7. Go to the Minimal ADB and Fastboot folder and open a command window there (shift key + right click and select open command window here option)
8. If the bootloader is locked, type: fastboot oem unlock at the command prompt, and press Enter. On your phone, choose “Yes” (use volume key) and confirm it by pressing the Power button.
[Note: This will ERASE your device, so make sure you have backed everything up first]
9. With the bootloader unlocked, you can install the system image. To do that, go to the Minimal ADB and Fastboot folder (where you have saved the unzipped factory image) and double click the ‘
[This script installs the necessary bootloader, baseband firmware(s), and operating system]
On Windows: Run the file “flash-all.bat”.
On Mac: Run the file “flash-all.sh” using Terminal.
On Linux: Run the file “flash-all.sh”.
[Wait for the process to complete. The phone will reboot automatically]
Finally, you should lock the bootloader again for security. For that, boot your Nexus into fastboot mode, and then issue the command: fastboot oem lock. (Source)