Update OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop Official Firmware – How To

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OnePlus One has started receiving CyanogenMod 12.1 OTA update based on Android 5.1.1 Lollipop. The update is around 645MB size and comes with YOG4PAS1N0 as Build Number. According to the reports the CM 12.1 OTA update is available for only 2% of the users as of now and will be rolled out to others in the coming days and weeks. So, just go to Settings > About Phone and check for Software updates and see if you are the one in those 2% users to get OTA update or not. If you don’t see any OTA update on your device and still want to update OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop then follow the instructions below and manually update your OnePlus One to CM 12.1 Android 5.1.1 Lollipop.

Update OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop Official Firmware Update OnePlus One to Android 5.0.2 Lollipop install Oxygen OS on OnePlus One and update OnePlus One to Android 5.0.2 LollipopInstall TWRP Recovery and Root OnePlus One Unlock Bootloader on OnePlus One

This tutorial is only for OnePlus One Smartphone and should not be carried out on other devices. Also follow the pre-requisites listed below before you proceed to update OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop.

Pre-Requisites:

  1. It is highly recommended to take a complete backup of your important data and settings. Below are some quick guides to get started with the backup process.

Backup and Restore SMS

Backup and Restore Contacts

Backup and Restore Call Logs

Backup files stored on Internal Storage on PC

  1. Make sure your device is charged to at least 75%.
  2. Enable USB Debugging on OnePlus One.
  3. Create a Nandroid Backup if you have Custom Recovery Installed.

Disclaimer: The steps listed in this tutorial should be carried out with extreme care and if you don’t know what you are doing avoid this tutorial. We are not responsible in any manner for any damage to your OnePlus One. So proceed at your own risk.

Note: You can flash this firmware package using TWRP or Stock Recovery, but make sure you have TWRP 2.8.6.0 or above installed on your device.

Also Read: How to Unlock Bootloader on OnePlus 2

How to update OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop:

Step 1: Download the CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop update package.

Step 2: Connect OnePlus One to PC and transfer the firmware package on your phone’s internal memory. Don’t copy it inside any folder, just place it at the root of internal storage.

Step 3: Boot OnePlus One into Recovery Mode.

  • Power off OnePlus One.
  • Press and hold Volume Down and Power button together until you see something on screen.

Step 4: Follow the instructions listed here and install CM 12.1 YOG4PAS1N0 Android 5.1.1 firmware package on OnePlus One.

Step 5: Once installed, reboot your device into normal mode.

Step 6: Now check the Android version and build number from Settings > About Phone.

That’s it, you have successfully updated OnePlus One to CM 12.1 YOG4PAS1N0 Android 5.1.1 Lollipop. Do share this tutorial with your friends on Facebook, Twitter and Google Plus and let your friends update OnePlus One to CM 12.1 YOG4PAS1N0 firmware.

Have any queries? Ask them in the comment section below.

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