Can the 'bootloader' be downgraded to 25r?

  1. TheRad1
    Honeycomb Aug 20, 2014

    TheRad1 , Aug 20, 2014 :
    As the title states...can we flash just the bootloader from 25R onto 30O using fastboot? And if so, therefore allow for the temporary boot of a custom recovery. Until now, I've only owned/flashed Samsung devices so still learning the fastboot idioms. Any ideas or nah?

  2. JuanL
    KitKat Aug 20, 2014

    JuanL , Aug 20, 2014 :
    I would love so...

    Please add "Can I then get it back to 30O´s bootloader?" Thanks

  3. TheRad1
    Honeycomb Aug 21, 2014

    TheRad1 , Aug 21, 2014 :
    I used the 'boot recovery' method while on 25R, but for some reason (security?) they have blocked that exploit, hence the question at hand.

    I had even tried this method I found in a Nexus forum:

    Here's some instructions I compiled for doing useful things with your Nexus. Also includes instruction to root nexus 4 without installing a custom recovery. Basically, you save the customrecovery.zip file then fastboot boot into it (NOT install, and notice you have to type the full command specified below, not just "fastboot boot customrecovery.img") and then install using the custom recovery, install SuperSU.zip for unrooting:

    1) Install all STOCK files:

    ./fastboot flash bootloader bootloader-XXX.img ./fastboot reboot-bootloader ./fastboot flash radio radio-XXX-XXX.img ./fastboot reboot-bootloader ./fastboot -w update image-XXX-XXX.zip ./fastboot oem unlock (to unlock bootloader)

    2) If you want to keep stock recovery, fast boot BOOT into custom recovery and install SuperSu.zip: 3) Install SuperSu.zip file (to root)

    ./fastboot -c "lge.kcal=0|0|0|x" boot customrecovery.img

    there used to be a 'fastboot boot recovery recovery.img' command, but Google removed it in 4.3, so now to simply boot into your custom recovery you can type 'fastboot -c "lge.kcal=0|0|0|x" boot customrecovery.img' instead and it'll do the same thing as the 'fastboot boot' command. Meaning it will revert to your stock recovery once you reboot. So boot into custom recovery, flash superuser (Koush or Chainfire's) and reboot. done.

    It didn't work but maybe another code for our device is needed?

  4. TheRad1
    Honeycomb Aug 21, 2014

  5. 0verlord
    Gingerbread Apr 26, 2015

    0verlord , Apr 26, 2015 :
    Can you please help me single out which exactly is the bootloader here in this link here

    Or either you can specify which partition of OPO is flashed by fastboot with command

  6. Deactivated User
    Apr 26, 2015

  7. Deactivated User
    Apr 26, 2015

    0verlord likes this.