Update OnePlus One to Android 5.1 Lollipop with CM12.1 Nightly ROM

We have been giving lot of coverage to OnePlus One smartphone and there’s reason for that! It is because the phone has got hundreds of thousands of users who have been demanding different custom ROMs and MODs in different forums. Today we came up with CM12.1 Android 5.1 Lollipop custom ROM for OnePlus One which is almost stable and comes with great features in addition to offering smooth Android 5.1 experience.

CM12.1 Android 5.1 ROM for OnePlus One

In this tutorial we will tell you how you can install CM12.1 Custom ROM based on Android 5.1.1 Lollipop on your OnePlus One smartphone. Behold and go through the tutorial below. Earlier today, we covered guide to update OnePlus One to CM12S manually and to improve OnePlus One battery performance.

Let me clear that having a rooted OnePlus One will void its warranty, so think before you proceed with rooting. Also this ROM is only for OnePlus One and practicing it on any other device can be fatal for that device. [Verify your phone model from Settings –> About Phone]

Safety Guidelines

  • Make sure your OnePlus One  is at least 61% or charged.
  • Ensure that you have complete backup of all your important data.
  • Make sure USB debugging is enabled on your smartphone. [If not, enable from Setting –> Developer Options]
  • Download and install OnePlus One drivers on your computer.

Files Required

The CM12.1 (Nightly) Android 5.1 Lollipop Custom ROM mentioned in this post belong to its respective developer. We are just covering tutorial to help you in its installation which is well-written and very easy to understand. However if you damage or brick your phone, AndroidsDNA.com cannot be held responsible.

How to Update OnePlus One to Android 5.1 Lollipop with CM12.1 Nightly ROM

Step 1: Download the custom ROM and GAPPS. For easy browsing, place both the downloaded zip files on desktop of your Computer.

Step 2: Connect your OnePlus One to your computer to transfer the download zip files to your phone SD card. [Make sure latest drivers are installed, otherwise your PC won’t recognize your phone]

Step 3: Turn Off your phone and boot it to recovery mode. For that, press and hold “Volume Up + Volume Down + Power” buttons simultaneously until you see boot menu. [You can’t use touch in recovery mode, so use Volume Up and Down buttons for navigation and Power button for selection]

Step 4: In recovery mode, first tap on “wipe data factory reset” option to perform a factory reset. Once this is completed, go to advanced options and select “wipe the cache” followed by “dalvik cache” options to clear the cache.

Step 5: Go back to main recovery menu and select “Install zip from sd card” followed by “choose zip from SD card” and select the ROM zip file you have transferred to SD card in Step 1. Once ROM flashing is completed, repeat the same step for GAPPS.

Step 6: Repeat the above step for Google Apps (GAPPS) installation.

Step 7: Once the installation is completed, go back to main recovery menu by selecting “+++++Go Back+++++” option  and reboot your phone by choosing “reboot system now” option from main menu. For the first time, your phone might take little more time than it usually takes, so don’t be panic as it is normal and will be only for 1st time.

Voila! You have installed CM12.1 (Nightly) custom ROM based on Android 5.1 Lollipop on your OnePlus One smartphone. If you faced any issue following the tutorial, let us know in comments!