How to Downgrade YU Yureka from CM12 to CM11 Kitkat OS

With the arrival of Cyanogen OS 12 update to YU Yureka, many users were pretty exited about the new features included. The happiness did not last long for any as there were many issues which were being reported by many users after they had updated their YU Yureka device. With the problems being faced many users are requesting the steps to revert back to the stable CM11 KitKat OS from Cyanogen OS 12.

Some of the problems which were being seen are – Black screen during calls caused due to proximity sensor issue, faster battery drain, heating problem, frequent unexpected reboots, etc. Even after the release of Android Marshmallow the issue with Android Lollipop has been solved for many. The best solution for this is to revert back to CM11 RAM based on Android Kitkat.

How to downgrade Yu Yureka

Note: Some users who downgraded from Official Cyanogen OS 12 to CM11 OS based on Kitkat had faced a bricked phone, this problem has been fixed using flashing official CM11 fast boot factory image which restores your phone to stick/factory state wiping out all data from your device.

Make sure you back up all your data before you start the process to make sure no data is lost. Be sure that you go ahead at your own risk, we are not responsible for any problem faced during the process.

Steps to Downgrade or revert back to CM11 OS based on Kitkat from Cyanogen OS 12 based on Lollipop:

First Step is to download the CM11 KitKat factory image onto your Laptop or PC which you will be using during the procedure, download the CM 11 KitKat factory image “” form here – Download

You also need to download the file which has the Fastboot & ADB files in it available form forums.xds developers users who have successfully tried this process – Download

Create and empty folder and copy both these files there, now extract the content here.

Go to command Prompt by pressing down on the Shift key press right click and select Command prompt to launch it, in your Windows Laptop or PC from the folder containing the extracted files.

Take you YU Yureka device and enter it into Fastboot mode., which is done by turning your phone Off, now press the Volume UP key while connecting the device to the Laptop or PC. Now you will be seeing the Fastboot Mode on your display right after connecting your device.

Now you have to enter a list of commands one after the other into the CMD windows which was opened earlier. The commands listed below should be entered one after the other and make sure that you get an Okay confirmation after each command is posted.

  • fastboot -i 0x1ebf oem unlock
  • fastboot -i 0x1ebf erase modem
  • fastboot -i 0x1ebf erase boot
  • fastboot -i 0x1ebf erase recovery
  • fastboot -i 0x1ebf erase aboot
  • fastboot -i 0x1ebf erase abootbak
  • fastboot -i 0x1ebf erase hyp
  • fastboot -i 0x1ebf erase hypbak
  • fastboot -i 0x1ebf erase rpm
  • fastboot -i 0x1ebf erase rpmbak
  • fastboot -i 0x1ebf erase sbl1
  • fastboot -i 0x1ebf erase sbl1bak
  • fastboot -i 0x1ebf erase tz
  • fastboot -i 0x1ebf erase tzbak
  • fastboot -i 0x1ebf format system
  • fastboot -i 0x1ebf format userdata
  • fastboot -i 0x1ebf format cache
  • fastboot -i 0x1ebf flash modem NON-HLOS.bin
  • fastboot -i 0x1ebf flash sbl1 sbl1.mbn
  • fastboot -i 0x1ebf flash sbl1bak sbl1.mbn
  • fastboot -i 0x1ebf flash aboot emmc_appsboot.mbn
  • fastboot -i 0x1ebf flash abootbak emmc_appsboot.mbn
  • fastboot -i 0x1ebf flash rpm rpm.mbn
  • fastboot -i 0x1ebf flash rpmbak rpm.mbn
  • fastboot -i 0x1ebf flash tz tz.mbn
  • fastboot -i 0x1ebf flash tzbak tz.mbn
  • fastboot -i 0x1ebf flash hyp hyp.mbn
  • fastboot -i 0x1ebf flash hypbak hyp.mbn
  • fastboot -i 0x1ebf flash boot boot.img
  • fastboot -i 0x1ebf flash recovery recovery.img
  • fastboot -i 0x1ebf flash system system.img
  • fastboot -i 0x1ebf reboot-bootloader
  • fastboot -i 0x1ebf oem unlock
  • fastboot -i 0x1ebf format userdata
  • fastboot -i 0x1ebf format cache
  • fastboot -i 0x1ebf reboot

After you have entered the last command your device will reboot automatically and after turning on it will be running on Android KitKat with CM11 over it.

Now make sure that you have re installed all the backed up data back into your device properly. You will be getting the OTA update for Lollipop which should be ignored for the time being before a stable update has been released by Cyanogen.


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