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CM12S Official Update arrives for OnePlus One featuring Android 5.0.2 Lollipop

The long awaited CyanogenMod 12S official firmware update arrived for the OnePlus One devices This amazing update is based on Android 5.0.2 Lollipop that can be installed now on OnePlus One manually. You might have installed OxygenOS but users owning OnePlus One have a good news that CM12S featuring Android 5.0.2 Lollipop has been finally released for these phone bringing an awesome material design, implemented throughout the Cyanogen OS. The OTA update will be soon available on OnePlus one but if you are interested and can’t wait for the OTA update on your device then go ahead and follow the given instructions to update OnePlus One to Android 5.0.2 CyanogenMod 12S Lollipop manually using a custom recovery.

Update OnePlus One to Android 5.0.2 with CyanogenMod 12S Official Firmware

You’ll need a custom recovery such as TWRP (Team Win Recovery Project)  already installed on your device in order to flash Android 5.0.2 based CM12S ROM zipped file. If you are now ready to install CM12S update then continue reading…


This guide containing the CyanogenMod 12S and instructions are working with only OnePlus One devices. Do not try to install this firmware on any other device or incorrect variant, as a result your device might get bricked. Verify the model number of your device first.


AndroidBlog will not be responsible for any kind of damage occurred to your OnePlus One during or after the installation of CM12S based on Android 5.0.2 Lollipop. Proceed at your own risk.


  • Take a proper backup of all your important data of the OnePlus One before proceeding to the installation guide using a recommended custom recovery like TWRP.
  • Enable USB Debugging Mode on your OnePlus One by navigating to Settings > Developer Options.
  • Check the battery level of your OnePlus One, it should be charged at least about 70% to prevent unexpected shutdowns while installation.

Required Files:

  • Download Android 5.0.2 CM12S ROM

Steps to Install Android 5.0.2 CM12S Lollipop on OnePlus One

1:- First, download the Android 5.0.2 CM12S Lollipop firmware ( from the above given links on the desktop of your PC.

2:- Connect the OnePlus One with the PC using its USB data cable and transfer the downloaded firmware to the root folder of your SD Card on the phone.

3:- Turn OFF the phone in order to boot into Recovery Mode.

4:- Next, turn ON the phone while pressing and holding Volume Down + Power keys at the same time to enter into recovery mode.

5:- While your device is now in TWRP Recovery, navigate to the main menu of recovery and choose Backup and do a swipe on the Swipe to Back Up option on the bottom of the screen to create backup.

6:- Go back to the main recovery screen and select Wipe option and after that swipe on the Swipe to Factory Reset option.

7:- Next, choose Install then locate the CM12S firmware file that you’ve already transferred to the root folder of your SD Card, select it and tap on Swipe to Confirm Flash option to begin the installation process. This process might take some time, so wait until the installation is successfully finished.

8:- Finally, Select RebootSystem to reboot the phone.

That’s All! You’ve successfully installed the latest Android 5.0.2 Lollipop on OnePlus One with CyanogenMod 12S software update.

Let us know in the comments section below if you have any query or issue while updating your OnePlus One to the official CM12S featuring Android 5.1 Lollipop.

Aamir Jamal

An Android Geek and audiophile who love to read and write reviews/tutorials about gadgets and new tech stuff. He has written 1007 guides and other posts.

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