OnePlus started rolling out Cyanogen OS 12.1.1 update for OnePlus One. The Cyanogen OS 12.1.1 is based on Android 5.1.1 Lollipop with build number YOG7DAS2K1 and it carries December security patches along multiple improvements. That is not all but one thing you would be glad to know is that the Cyanogen OS 12.1.1 is embedded with Microsoft’s virtual assistant Cortana. The Cyanogen OS 12.1.1 is available to download via OTA but your device should be running on YOG4PAS3JL build to avail the OTA update.
Although we have mentioned two method to download and install the Cyanogen OS 12.1.1 update with Cortana on OnePlus One. The OTA method is pretty simple just give a try whether your device is eligible for the update, go to Settings >> About Device >> Software updates, if this method is successful then well and good other wise you can download the Cyanogen OS 12.1.1 update with Cortana for OnePlus One and install it manually via stock recovery, the update size is 68.8 MB just go ahead and install the Cyanogen OS 12.1.1 update with Cortana on OnePlus One.
How to install Cyanogen OS 12.1.1 update with Cortana on OnePlus One
If the OTA method doesn’t work for you don’t worry just follow this manual procedure to install Official Cyanogen OS 12.1.1 update with Cortana on OnePlus One using Stock Recovery.
Connect your device to PC and transfer the download Cyanogen OS 12.1.1 update zip file on your device storage.
Now disconnect the device from PC and turn it off properly
Turn it on again by pressing and holding Vol Up + Power button at the same time until you see a screen with the list of commands.
Use Volume keys to navigate and select the Recovery Mode option from the list by pressing Power button.
You will see the Android Logo with an exclamation mark, now press volume up + Power to see the recovery options.
Browse and select apply updates from sd card and choose the downloaded Cyanogen OS 12.1.1 update zip file.
Wait for the process to complete, once the process is completed just reboot your device.
That’s it! You have successfully installed Cyanogen OS 12.1.1 update with Cortana on OnePlus One. If you have any query feel free to contact us by posting your queries in the below provided comment section.