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Fastboot not working properly after full repair phone as empty board

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  • Fastboot not working properly after full repair phone as empty board

    Dear community,
    I hat to do a full repair as empty board on my Huawei P8 lite (ALE-L21) using DC Phoenix. It was successful in most aspects: I managed to install the stock rom and the phone boots. But for some strange reason, important fastboot commands are not working anymore:

    Code:
    fastboot devices
    is fine an finds my phone.
    Code:
    fastboot oem device-info
    fails with
    remote: 'invalid command'
    . The same holds true for many other commands, such as e.g.
    Code:
    fastboot flashing lock
    or
    Code:
    fastboot oem lock
    Trying to flash any recovery image (no matter if stock or TWRP) fails with
    image verification error
    . Surprisingly,
    Code:
    fastboot erase recovery
    seems to work...so it doesn't look like some general access problem...

    Since fastboot images were part of the board file, I assume that there might be something wrong with them... I know that you don't provide support for custom recovery images / roms etc. That's fine; all I ask for is to get fastboot back to normal operation (as it was before the full repair).

    The reason for the full repair was a data corruption in the HIFI Partition. It happened for unknown reasons while the phone was in my pocket (I haven't done anything). All out of the sudden it was bricked with:
    ERROR MODE
    Func NO : 8 (hifi image)
    Error NO : 1 (security verify failed)



    Here's some more detailed information on what I've done afterwards:

    I've used ALE-L21_HL3ALICEMAA001079_Board Software_inc_testpoint.dgtks from the DC Phoenix download site as "Update file" together with the stock rom from https://www.getdroidtips.com/huawei-p8-lite-b633-b634-marshmallow/ as "Update APP file".

    The Process ended with "Writing device finished OK" and I was able to boot the phone.

    After that I used the HCU Client to set back the SN from 0123456789ABCDEF to the initial one. The IMEI seemed to be unchanged. Hence, I left it as it is.

    The current status is probably described best by the outputs of HCU client and DC Unlocker:

    Code:
    IMEI: ####....
    IMEI2: ####....
    IMEISV: 00
    Firmware ver.: ALE-L21 C900B550
    Dataver: (unknow)
    SN: QLF...
    PCB SN: 2V3...
    Vendor: hw
    Country: eusingle
    FASTBOOT: DailyBuild_201603111339_FASTBOOT
    BOOT: DailyBuild_201603111339_BOOT
    RECOVERY: (unknow)
    SYSTEM:C900B550_SYSTEM
    MAINVER:ALE-L21 C900B550
    DATAVER: (unknow)
    APTIME:Fri Mar 11 13:44:51 CST 2016
    RAM: 2G
    eMMC: 16G
    eMMC ID: 00000000000000000000000000000000
    HUN: 0000000000000000
    Please note: RECOVERY is "unknown", because I tested fastboot erase recovery. But this doesn't affect the problems with fastboot...

    Code:
    DC - Unlocker 2 Client 1.00.1431
    
    Detecting phone :
    
    selection :
    manufacturer - Huawei phones
    model - Auto detect (recommended)
    
    Found Applications port COM18
    
    Model : Huawei HiSilicon Kirin Android phone
    IMEI : ####...
    Serial NR. : QLF.....
    Firmware : ALE-L21 C900B550
    SIM Lock status : unlocked

    So my question is: How can I make fastboot fully operational again?
    Thanks a lot in advance!
    Last edited by wwwindisch; 2020-05-31, 07:40 PM. Reason: Removed private information.
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