Mi4c Bricked After 'stable' Miui 9.2.2 Installation Failure?

Discussion in 'Xiaomi Mi 4C' started by mlntdrv, Feb 8, 2018.

  1. mlntdrv

    mlntdrvMembers

    Aug 15, 2016
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    Hi guys,
    The ROM was xiaomi.eu_multi_MI4c_V9.2.2.0.NXKCNEK_v9-7.0.zip (I'm not allowed to post the link lol). I got TWRP backup before I did anything. Then I wiped davik, cache, system and data. So far everything was good. Then I tried installing the ROM, but it failed with error "unknown command (log)". After selecting reboot, I don't have recovery mode so I can't recover from the backup. I tried flashing TWRP again in fastboot, but I got "FAILED (remote: Partition flashing is not allowed)" and its bootloader is NOT locked.
    So, is it bricked? Is there anything I can do?
    BR,
    Milan
     
  2. ingbrzy

    ingbrzyXiaomi.eu Multilang leader
    Staff Member

    You were on 5.1 before?
    Update to 7.x locked your bootloader.. Unlock it first..
     
  3. mlntdrv

    mlntdrvMembers

    Aug 15, 2016
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    #3mlntdrv,Feb 8, 2018
    Last edited: Feb 8, 2018
    Thank you for your answer. I tried, however in MiFlashUnlock I got the message "Current account cannot be used to unlock this device". Is this because I already unlocked it once?
     
  4. iamme729

    iamme729Members

    Nov 22, 2015
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    You can unlock it as many time as need be...do you have another account the phone is signed into...if so...sign into that account with the unlock tool also....

    Sent from my Mi-4c using Tapatalk
     
  5. Loddle

    LoddleMembers

    Apr 30, 2017
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    I am facing the same problem since I installed official rom (removed it from miui account) my bootloader was locked again and despite vpn I can not bind the phone to account (although or because I see it again in mi cloud under my devices once logged in to mi account again). Unlock stops at 99% with can't use this account to unlock (testet both email and phone number as login and enabled find device option which works in mi cloud). I keep on trying
     
  6. mlntdrv

    mlntdrvMembers

    Aug 15, 2016
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    True. For me the only option now is to use the official chinese ROM for fastboot (doesn't require unlocking the bootloader).
     
  7. ToWaRR

    ToWaRRMembers

    Aug 7, 2016
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    I think u delete all. U delete data and system.

    U only need to delete cache and dav.

    Try use sd card or conect to pc and transfer rom on phone.

    If you twrp is still working

    Sent from my MI 5X using Tapatalk
     
  8. iamme729

    iamme729Members

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    When all else fails, you can use this method and start from the beginning....
    https://forum.xda-developers.com/mi-4c/general/guide-unlocking-mi4c-bl-verification-t3336779
    http://xiaomitips.com/guide/unlock-mi-4c-bootloader-without-official-permission/
     
  9. royo

    royoMembers

    Aug 8, 2014
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    I have the same problem.
    i tried to update to miui ver 9 from 8.5.1.0 (which is miui 8 over android 7) but failed
    i tried to update from dev ver 6.12.22 after checking that the BL is unlocked but failed
    i tried to update from official 6.1.7 but failed
    no matter what i try, installing any version of miui 9 results in the phone turns off after 5 seconds of boot - MI logo (if connected to usb, it will loop).
    I tried ver 9.1.3.0 and the newest 9.2.2.0
    my BL never got permission to unlock since it was unlocked from stock (bought before 2017).

    Any suggestions?
     
  10. iamme729

    iamme729Members

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    A Little more info please...how are you doing these updates ?
     
  11. royo

    royoMembers

    Aug 8, 2014
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    i was using ver 8.5 for a while. TWRP was ver 3. tried to update to ver 9.2.2 by using updater. caused device to turn off after 5 seconds. then i used this procedure (en.miui.com/thread-237832-1-1.html) to roll back to official ver 6.
    2nd try:
    installed TWRP ver 3.1.1. ok
    installed dev ver 6.12.22 (MIUI 8 over android 5.1) via TWRP then verify BL unlocked. ok.
    then updated via TWRP to ver 9.2.2. (always wipe cache dalvik and data). fail
    3rd try:
    this time TWRP was not erased, so i downgraded to 6.12.22. OK
    checked with fastboot that BL is unlocked. OK
    updated back to 8.5.1 (MIUI ver 8 over android 7). OK
    then updated via TWRP to ver 9.1.3. (always wipe cache dalvik and data). fail
    went back to 8.5.1.
    i read a lot about problems moving from android ver 5.1 to 7, but i had ver 8.5.1 installed for a long time and it's android 7
     
  12. iamme729

    iamme729Members

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    http://xiaomitips.com/guide/unlock-mi-4c-bootloader-without-official-permission/
    Follow this guide...start from scratch.....

    Sent from my Mi-4c using Tapatalk
     
  13. royo

    royoMembers

    Aug 8, 2014
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    hi iamme729
    the procedure i indicated above is simmilar to the link you provided.
    I know how to roll back to basic version, i just can't find a way to successfully install MIUI v.9 without softbricking
     
  14. Stanstok

    StanstokMembers

    Jan 19, 2018
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    guys, you must first use the latest Chinese fastboot and block the bootloader
     
  15. iamme729

    iamme729Members

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    When you go to v.9 your bootloader will be locked...unlock with official unlock tool...then boot the device....

    Sent from my Mi-4c using Tapatalk
     
  16. royo

    royoMembers

    Aug 8, 2014
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    I will try to unlock before booting.
    but installing 8.5 should be the same, the BL is blocked, but i can still boot.
    thanks
     
    iamme729 likes this.
  17. Roberto from Switzerland

    Mar 18, 2018
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    initial situation:

    • bricked Mi 4c without Unlock

    process:
    • download Fastboot Rom
      • "Xiaomi Mi 4c Latest China Stable Version Fastboot File Download"
    • extract Fastboot ROM to directory (e.g. "libra_images_V9.5.1.0.NXKCNFA_20180306.0000.00_7.0_cn")
    • download twrp-3.1.1-1-libra.img
    • copy "twrp-3.1.1-1-libra.img" into the "image" directory of the extracted Fastboot Rom
    • rename "recovery.img" to "recovery.img.backup"
    • rename "twrp-3.1.1-1-libra.img" to "recovery.img"
    • install and setup Xiaomi Mi Flash Tool
    • setup usb cable for deep flash (en.miui.com/thread-314860-1-1.html)
      • Turn off Mi 4c
      • plug USB-C into Mi 4c
      • plug USB (with the wire attached to the 2nd pin) into Computer
      • pull the wire off without unplugging USB
    • in Xiaomi Mi Flash Tool
      • "refresh" - device should be listed
      • "select" directory (e.g. "libra_images_V9.5.1.0.NXKCNFA_20180306.0000.00_7.0_cn")
      • "flash" - wait until finished
    • enter TWRP with [power] and [Vol +]
    • download lineage-image and GoogleApps (ARM64) zip files
    • in TWRP mount drives and move zip files from computer to device
    • Install LineageOS
    • Reboot
     
  18. AtraMors

    AtraMorsMembers

    Mar 25, 2018
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    Hello guys, I have same problem with my Mi4C.
    I can install weekly "xiaomi.eu_multi_MI4c_7.9.7_v9-7.0", but if I do update the system - I got bootloop.
    At this moment I use "xiaomi.eu_multi_MI4c_V8.5.1.0.NXKCNED_v8-7.0" and it works.
    How can I install "xiaomi.eu_multi_MI4c_V9.5.1.0.NXKCNFA_v9-7.0" correct without bootloop? If it possible.

    Btw use Multi TWRP 3.1.1.0 for Android 5 and 7, bootloader is unlocked. sry for my english.
     
  19. AtraMors

    AtraMorsMembers

    Mar 25, 2018
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    1.Flash .tgz over MiFlash
    2.Unlock BL
    3.Flash TWRP 3.1.1.1
    4.Flash Xiaomi.Eu v9.5.1.0 over TWRP

    Right?

    But MiUnlock says "Current account cannot unlock this device" during 2,5 month.
     
  20. Stanstok

    StanstokMembers

    Jan 19, 2018
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    show screenshot
     
  21. AtraMors

    AtraMorsMembers

    Mar 25, 2018
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    #22AtraMors,Mar 25, 2018
    Last edited: Mar 25, 2018
    [​IMG]

    I unlocked my phone once and can't do it anymore. Some people says that need wait 14 days or 30 days, but I waited ~80 days and still can't.

    -upd-
    Hmm, what if I replace recovery.img in .tgz to TWRP with same name and flash it?