One of the most keenly awaited Android 5.0 updates, the OnePlus One has finally started receiving the update to CyanogenMod 12 starting today morning here in India. It was reported earlier during the weekend that the certifications had come by and as a result you would be able to download the update OTA pretty soon. Not many guessed that it would be starting today only. The update will take your OnePlus One device to Android 5.0.2 and it is expected that the Lollipop update for the YuYureka, the other device with CyanogenMod ROM will be getting the update very soon too.
The Indian users too are reporting the updates hitting their phones, though if you have not received the update yet, you can download the ROM for the update from Android Police right here.
Once that is done, you will need to follow the instructions given below to flash it. These instructions are from the OnePlus forum and we have also included a link at the bottom of the post so that you can go ahead and catch up on the discussions and look up any confusion if you may have.
1.Copy the downloaded zip to your phone (not inside any folder, just inside internal storage.)
2. Now power off phone then try to press power button and volume down together.
3. It will automatically go inside something called CM recovery, in that second or third option will be “APPLY UPDATE”, select it.
4. Now press “from internal storage” now it will show 3 options select ” 0 ” now it is inside your internal storage just like file manager, now find this zip in that list(it will surely be there)
5. Select it and press “Yes” if it prompts else no need, it will start updating and come back to main menu.
6.Now press “restart”–>first option… That’s it, Done!!
Source: OnePlus Forum