No bootable a/b slot

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glossallalia

Member
Mar 27, 2019
6
0
Hi all,
I have a T-Mobile Revvlry that I’ve been trying to flash lineage os to. It was unlocked and now after so many tries, it is oem locked

I went through all the unlock bootloader process before and was able to flash but always no os installed are you sure you want to proceed.

Slots a and b were confusing and so I changed the slot to a for flashing but this time the bootloader screen changed along with the serial number and now it is oem locked and can do nothing now .

I tried to boot twrp but no success. How can I oem unlock?? I tried the command fastboot oem unlock and fastboot flash etc but it is denied and that I need a code. Which I do have but don’t know how to use it now.
 

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sd_shadow

Recognized Contributor
  • Sep 21, 2011
    17,538
    1
    8,179
    South Dakota
    goo.gl
    Moto X4
    Moto G7 Power
    Hi all,
    I have a T-Mobile Revvlry that I’ve been trying to flash lineage os to. It was unlocked and now after so many tries, it is oem locked

    I went through all the unlock bootloader process before and was able to flash but always no os installed are you sure you want to proceed.

    Slots a and b were confusing and so I changed the slot to a for flashing but this time the bootloader screen changed along with the serial number and now it is oem locked and can do nothing now .

    I tried to boot twrp but no success. How can I oem unlock?? I tried the command fastboot oem unlock and fastboot flash etc but it is denied and that I need a code. Which I do have but don’t know how to use it now.
    Did you follow the preinstall instruction and use copy-partitions-20210323_1922.zip?
    if not that's what caused the problem.

    You will need to use a blankflash to fix
    Search for Channel blankflash there are some here
    but you may need a newer one

    The device will need to be in Emergence Download Mode (EDL Mode)
    Use
    Code:
    fastboot oem blankflash
    or
    boot twrp (use full twrp file name)
    Code:
    fastboot boot twrp.img
    and use
    Code:
    adb reboot edl

    EDL Mode is just a black screen, and
    Windows device manager will see it as a Qualcomm device (attached)
    If it says ..._bulk... you need the Qualcomm drivers
     

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    glossallalia

    Member
    Mar 27, 2019
    6
    0
    Did you follow the preinstall instruction and use copy-partitions-20210323_1922.zip?
    if not that's what caused the problem.

    You will need to use a blankflash to fix
    Search for Channel blankflash there are some here
    but you may need a newer one

    The device will need to be in Emergence Download Mode (EDL Mode)
    Use
    Code:
    fastboot oem blankflash
    or
    boot twrp (use full twrp file name)
    Code:
    fastboot boot twrp.img
    and use
    Code:
    adb reboot edl

    EDL Mode is just a black screen, and
    Windows device manager will see it as a Qualcomm device (attached)
    If it says ..._bulk... you need the Qualcomm drivers
    Blankflash did work to blank the screen. But <adb reboot edl > came back with ‘no devices/emulators found’.
    I do have the Qualcomm drivers
     

    glossallalia

    Member
    Mar 27, 2019
    6
    0
    No, you only use "adb reboot edl" if "fastboot oem blankflash" didn't work.
    Now use the blankflash file.
    Ok, when I do the blankflash, there is the blank screen, however I can't communicate with the device after that and if I have lineage.zip or copy-partitions-etc...zip, how could I flash it or what is the next step? I'm new at this - I started this a year ago, after, gave up for a while.
    Thanks!
     

    sd_shadow

    Recognized Contributor
  • Sep 21, 2011
    17,538
    1
    8,179
    South Dakota
    goo.gl
    Moto X4
    Moto G7 Power
    Ok, when I do the blankflash, there is the blank screen, however I can't communicate with the device after that and if I have lineage.zip or copy-partitions-etc...zip, how could I flash it or what is the next step? I'm new at this - I started this a year ago, after, gave up for a while.
    Thanks!
    If you have run the blank-flash.bat and it worked the device will reboot to bootloader.
    If the device remains in EDL Mode, the blankflash failed, you may need a newer version.
    You may need to do some searching in the forums for a newer version.
     

    glossallalia

    Member
    Mar 27, 2019
    6
    0
    If you have run the blank-flash.bat and it worked the device will reboot to bootloader.
    If the device remains in EDL Mode, the blankflash failed, you may need a newer version.
    You may need to do some searching in the forums for a newer version.
    thanks - blank-flash.bat worked and i'm back to flashing again - I sideload copy-partitions-etc.zip and the lineage.zip and there is 'no os installed...' this happens every time, and before as well. When I 'start' from the fastboot flash mode, it starts to draw the lineage symbol, then goes back to bootloader.
     

    sd_shadow

    Recognized Contributor
  • Sep 21, 2011
    17,538
    1
    8,179
    South Dakota
    goo.gl
    Moto X4
    Moto G7 Power
    thanks - blank-flash.bat worked and i'm back to flashing again - I sideload copy-partitions-etc.zip and the lineage.zip and there is 'no os installed...' this happens every time, and before as well. When I 'start' from the fastboot flash mode, it starts to draw the lineage symbol, then goes back to bootloader.
    what is the file name of lineage.zip?
     
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