Can't Unlock/root/or Install Twrp.

[Yasje]

Hey guys,

I got some issues with my mi4c.

When i installed 8.3 stable rom long time ago... i lost my root, twrp, and my bootloader got locked.

i have tried everything so far but nothing helped...

Can someone help me with it?

Thank you a lot.

 

[Yasje]

What have you tried...TWRP version...ROM version .. current device status ...etc ...

Sent from my Mi-4c using Tapatalk

Thank you for the reply. but the phone is dead.

This thread can be closed.

 

[kan_narhio]

Sorry to hijack this thread, but I have a similar problem and my phone is not dead... yet.

I have a Mi4c bought at GB, which came with a shop rom version 8.2.1.0.0 and locked bootloader.
After many tries, I managed to unlock the bootloader unofficially, downgrading to 6.1.7 image through fastboot and unlocking also by fastboot.
Then I installed TWRP suggested in here: ...xiaomi.eu/community/threads/7-10-19.41961/ followed by the version 8.5 of Miui Eu ROM.
Everything went fine and I ended up with my phone on Miui 8.5.1.0.

But... when I tried to reboot to recovery, I found out I haven't got any!
I tried to reflash TWRP once again by fastboot but found out that I could't because Miui Eu 8.5 relocked my bootloader.
Tried to reflash official 6.1.7 again without sucess, even through EDL.

Now I can't install any official rom, either through update app, fastboot, Mi flash or Mi Suite and I can't unlock the bootlader officialy because I have an unofficial rom.

It's not that I don't like the rom.
The reason is I was having some sound issues that I thought it might be due to apps/files conflicts and I would like to try a clean flash (wiping system partition) and the in the previous instalation I didn't do a full wipe, and I still have the same issues.

Is there any solution for my problem or am I forever tied to this rom.

 

[kan_narhio]

Have you tried to flash 6.1.7 using MiFlash Tool ?

Yes, using MiFlash 2014.05.09.0, the same version I used to flash the first time.
Now returns the error "unspecified error(0x80004005: FAILED (remote: Critical partition flashing is not allowed))

 

[MeiGuddet]

Maybe try a newer Mi Flash:http://xiaomiflashtool.com/
Or try this: https://xiaomi.eu/community/threads/tool-xiaomitool-xiaomi-rom-changing-made-easy.40576/

 

[kan_narhio]

Delete

 

[Yasje]

Now I can't reply to the thread...

Just use fastboot and follow the steps


Sent from my HTC U Play using Tapatalk

 

[kan_narhio]

Delete

 

[kan_narhio]

Delete

 

[kan_narhio]

...Type command fastboot oem edl > Then, flash through Mi Flash

Tried that to. MiFlash returned an error I can't specify know. Curiously, thats how I managed to install 6.1.7 the first time.

Maybe try a newer Mi Flash

Yesterday I tried the 2 last versions. Couldn't even install them. Maybe something to do with my computer.

But there are some progress... and a new dead end!

Finally I was able to unlock the bootloader oficially (I was trying to unlock it with my wife account, but I have asked for permission with my account, duhhh!!)
Now I have the bootloader unlocked, I was able to flash TWRP 3.1.1.1 and flashed CM 13.1 (the same version I have on another Mi4c), but the phone remains stuck at Mi logo.

The Miui version I had previously installed was based on Nougat. Should this have something to do with the fact that the phone doesn't boot with a Marshmallow rom (CM 13.1)?

Later I'll give it a try with xiaomitool.


To the moderation:
Sorry about the previous replies, but I was getting the error I couldn't post links, although this reply doesn't have any.

 

[kan_narhio]

There was never a Marshmallow ROM for Mi4c...

MIUI maybe not, but I'm trying to run CM 13.1.
I read somewhere the sound issues I'm having might be due to MIUI kernel, so I would like to find out if its really that or if its hardware problem.

Lollipop TWRP version is 3.0.2.0.....

Now that you mention it, my other Mi4c has TWRP 3.0.2.0 recovery!

 

[kan_narhio]

Good news...
It seems my bootloader was updated to Nougat when I flashed MIUI 8.5, so anything else other than android 7 I throw into it won't stick.
So back to twrp 3.1.1.1 and LineageOS 14.1 into it... and is back alive.

... and bad news: the sound problem still persists, so its a hardware issue.
Although its a "now it works, now it doesn't" issue, when it fails it crashes the phone with a simple phone call. Other than that works fine.

Now try to find someone to repair it.

Thank you all for the tips, they were really helpful.

 

[kan_narhio]

You can always give this a try ...
https://xiaomi.eu/community/index.php?threads/39608/

Sent from my Mi-4c using Tapatalk

Thanks, I'll do it if/when I get it repaired. For now its not worthy since it became useless as phone.
Thank you once again.