The Cyanogen OS 12.1 update (YOG4PAS3JM) for Yu Yureka/ Yureka Plus will fix many bugs found in the previous build, improves stability and increase security. The update will include an enhanced Thermal control feature, which will fix the Yu Yureka’s annoying over-heating issue.

Also, this update will include improved memory optimizations, better data connectivity and the Camera Next app is optimized for more battery and thermal efficient. Other new features in Cyanogen OS 12.1: To install Cyanogen OS 12.1 update on YU Yureka and Yureka Plus, first, check for the update by going to Settings -> About phone -> System update. If the update is available, just download and install the update. However, if you have not received the update for some reasons, you can install it manually by downloading the firmware.

Manually Update Yu Yureka/ Yureka Plus to Cyanogen OS 12.1

Note: The below file is an OTA update file. To apply the update, your device should be running on the latest version of Cyanogen OS 12.

  1. Download Cyanogen OS 12.1 OTA update zip file [HERE] or [HERE] (cm-12.1-YOG4PAS3JM-tomato-signed.zip) and transfer the update zip file to your phone’s internal storage.
  2. Now, boot your Yureka into recovery mode. To do so, switch off the phone and then hold down the Volume up + Volume down + Power buttons at the same time
  3. From recovery, select Apply update -> select the zip file you have transferred in step 1 above. Once the flashing process is finished, go back to the main recovery menu, select the Reboot system now option and wait for the reboot process to complete (Source, 1, 2)