unable to install twrp over 3.1.1.1 on mi4c (trying to go from android 7.1 to 8 or 9)

[monstreys]

Hey everyone,

i usually don't post questions but i've been on pretty much every forum the web has to offer and am still stuck so i'll try my luck here.
i'm currently running lineage 7.1 on my mi4c, i've used another phone for a while but now that my mi4c has a new battery i wanted to start using it again, is also decided this would be the time to update it to android oreo or pie, this however seems to be impossible.

i can only use twrp up to 3.1.1.1, all higher (and unofficial versions) will not boot via fastboot 'dtb not found' or when flashed via older twrp will freeze on boot screen.
whenever i try to install a new rom it tells me 'error code 7', when i remove the 'assert' lines in the update it gives me 'error code 6'

my device is unlocked, i have checked this in fastboot.

do i have to install miui again before installing another rom? do i have to go back to the standard recovery? i'm currently running out of ideas and hope you guys might be able to help me. maybe i'm overlooking something simple.

kind regards,
Monstreys

 

[makaveli97]

Hi! I don't know if this is a coincidence or not, but I was about to start a similar thread.
I try to do exactly what you are doing. I want to install LineageOS 16, unofficial ROM.
For this you need a newer TWRP, like 3.2.3.0, but it doesn't work 'dtb not found' like you said. I found out that this doesn't work because you need to have nougat bootloader. Most probably you have lollipop bootloader like I have, and thats why newer versions of TWRP are not working. I think the only way to update your bootloader to a nougat one is to flash the latest MIUI ROM. But, unfortunately, when you do that the bootloader gets locked, and I can't unlock it via MiUnlock due to Error:20091 when I try to link the phone to the Mi account. In MiUnlock it gives me the "this account cannot unlock the phone" or something like that.

Now I removed the "assert" lines from my rom and flashed it without the error 7 or 6. Some error still apears, but it also apears when I flash LineageOS 14.1, and that version is working even with those 2 errors I can't remember during flash.
After I flashed LineageOS, I flashed gapps and then superSU, and now my mi4c is stuck on mi logo for about 20 minutes, and I think it will remain that way.

So, there are 2 things we need to solve. We need to find a way to install latest MIUI without relocking the bootloader because I can't unlock it via MiUnlock, or to find out why after I flashed LineageOS 16 it gets stuck on MI logo.

 

[makaveli97]

I think I found the solution. Do exactly what this guy is doing here and it might work.
https://forum.xda-developers.com/showpost.php?p=78640737&postcount=63
I followed that guy instructions and I managed to install TWRP 3.2.3.0 and LineageOS 16, and it booted. Now I am at the setup part but it has very big lag...

 

[monstreys]

I think I found the solution. Do exactly what this guy is doing here and it might work.
https://forum.xda-developers.com/showpost.php?p=78640737&postcount=63
I followed that guy instructions and I managed to install TWRP 3.2.3.0 and LineageOS 16, and it booted. Now I am at the setup part but it has very big lag...

i

i was unable to install the patch file, this nonetheless fixed my problem, thanks!!

 

[despeh]

if above not working, another method to do it based on my method.
https://forum.xda-developers.com/showpost.php?p=81573941&postcount=199

 

[walkmanhuang]

I think I found the solution. Do exactly what this guy is doing here and it might work.
https://forum.xda-developers.com/showpost.php?p=78640737&postcount=63
I followed that guy instructions and I managed to install TWRP 3.2.3.0 and LineageOS 16, and it booted. Now I am at the setup part but it has very big lag...

My MI4C has been successfully flushed into lineage-17.1-20200220-UNOFFICIAL-libra.zip. It has been updated on TWRP 3.1.1 and keeps reporting error 7, and then abandoned TWRP3.1.1 and flashed into OrangeFox-R10.0-1-Stable-libra.zip After brushing libra-aqua_firmware_7.2.9.zip on this REC, you can flash lineage-17.1. I do n’t think it will be impossible to refresh because of partition problems. If you only need to upgrade lineage-17.1, you can refer to this method.:good::good:（Translation is not easy to use）

 

[corwinux]

There is a 3.2.x around. If you don't want to bother go in the zip, /META-INF/com/google/android/ and delete the first lines (the ones starting with "assert") from updater-script, save and flash again.

Right now, i'm using 3.1.1 -1 btw
It's latest twrp ver from official

TWRP-20190418-3.3.0.0-libra.img for the Xiaomi Mi 4c, by GuaiYiHu :
https://androidfilehost.com/?fid=1395089523397945946

Latest firmware for the Xiaomi Mi 4c libra :
https://github.com/XiaomiFirmwareUp...iui_MI4c_V10.1.1.0.NXKCNFI_13b9b312d0_7.0.zip