V8.2.3.0.NXKCNEC, root and bootloader

ROMs, Mods, Discussion and all other Topics about the Xiaomi Mi 4c (libra).

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kemar
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V8.2.3.0.NXKCNEC, root and bootloader

Postby kemar » 02 Jun 2017, 08:51

Hi there,

I'm new on this forum. I'm using a Mi4C for a long time now. As a french user, i used to use roms from "miui-france". But my phone is slowing down... and i want to try Nougat :D

So i decided to download "globeROM V8.2.3.0" (exact filename "globeROM_v8_libra_V8.2.3.0.NXKCNEC_cfg-ssg.zip"). Installation wasn't a problem. Using TWRP 3.0.2-0, i totaly wipe the phone before install (cache, dalvik, data...)

But now i've some problems with the new ROM:
No root
Impossible to go in "Audio options" (crash) Ok, it's Viper4Arise
No Viper4Arise (driver "unsupported" )
No more TWRP !


It looks like the new ROM locked my bootloader. So... i've just re-unlock with official method, i'm reinstalling TWRP right now, and i'll try a new install with "globeROM_v8_libra_V8.2.3.0.NXKCNEC_cfg-lssaovgw.zip".



I don't understant why i encounter those problems. I've attached the log, in case someone want watch. I read the FAQ, but i didn't modify the file name.

I'll continue today with a new install !

EDIT:

Ok some news !

I've reinstalled "globeROM_v8_libra_V8.2.3.0.NXKCNEC_cfg-lssaovgw.zip". After install, no boot. It was launching TWRP like a "bootloop" (sorry, don't know how to describe this in english).

So i flash another bootloader, "ZCX-TWRP_MI4C-libra.20170228-7.0.img". OS is booting, but still no root. I think there is a problem with Magisk.

With last flash, i disable everything in ROM generator. Althrough, MiXplorer is installed. In the log file, i can see :

Code: Select all

#####START remove mixplorer
rm: can't remove '/data/app/*mixplorer*': No such file or directory
rm: can't remove '/data/app/mixplorer': No such file or directory
rm: can't remove '/data/data/*mixplorer*': No such file or directory
ls: /data/app/*mixplorer*: No such file or directory
ls: /data/data/*mixplorer*: No such file or directory
#####END remove mixplorer



Trying with another config, all uncheck, SuperSU Root.
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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby dr4kendroid » 02 Jun 2017, 12:34

Well it is known that xiaomi has relocked the bootloader on Mi4c when you installe 7.0 versions over marshmallow!
You have to do that step 1 time and it can cause problem like it does for you.

I would recommend doing a complete new flash! That means fastboot and wipe everything !
1- do backup of all files on your phone (even sdcard content)
2- download the latest fastboot rom for mi4c from http://en.miui.com/a-234.html
3- install this rom via fastboot and "wipe all"
4- download latest TWRP Recovery for mi4c https://www.androidfilehost.com/?fid=457095661767135741
5- flash recovery via fastboot
6- reboot to recovery and copy our ROM to your phone
7- install our ROM without problems

hope that helps
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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby kemar » 02 Jun 2017, 13:34

Hello dr4kendroid, thanks for your help !

I'll wipe all again, it's not a problem, i want a clean phone.

The thing i don't understand is the installation of the lastest fastboot rom. What is it for technicaly ?

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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby dr4kendroid » 02 Jun 2017, 13:44

kemar wrote:Hello dr4kendroid, thanks for your help !

I'll wipe all again, it's not a problem, i want a clean phone.

The thing i don't understand is the installation of the lastest fastboot rom. What is it for technicaly ?

A fastboot ROM will repartition your whole phones storage and install the complete ROM and all other important filesystems!
its not a hard task to do . You will find thousands of how-tos on the internet.
basically you just have to connect your phone to USB on your computer and then dounle click the correct .bat file on the fastboot rom folder.
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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby kemar » 02 Jun 2017, 14:39

Ok, i followed your instruction !
Everything seems ok, no more problem with "bootloop" after flashing Mi-Globe ROM. Thanks !

Now i'm waiting for the first boot on the "earth" loading screen. It's a little long (10mn+), but i'll wait.

I'm curious, but once bootloader unlocked, it stays ? Device-info before flashing Mi-Globe says :

Code: Select all

D:\MI4C>fastboot oem device-info
...
(bootloader)    Device tampered: false
(bootloader)    Device unlocked: true
(bootloader)    Device critical unlocked: true
(bootloader)    Charger screen enabled: true
(bootloader)    Display panel:
OKAY [  0.054s]
finished. total time: 0.056s


Edit:

Ok, the rom is installed and boot is OK. But still a strange behavior, Root checker says "no root". I'll try again later.

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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby dr4kendroid » 02 Jun 2017, 17:18

for further help you should upload the install and boot log as described in FAQ. you have to grant root access to the root check app ..
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Re: V8.2.3.0.NXKCNEC, root and bootloader

Postby kemar » 02 Jun 2017, 21:39

Ok, so i install SuperSU 2.79 with TWRP and i got root access.

I still find this strange, because MiXplorer is installed, while it was unchecked. I won't spend more time on this for the moment (and i'm not competent enough !).

I don't know if it's a problem with my phone, the ROM, or the way i install it. If other people have similars problems, let me know !

The steps i followed are those given by dr4kendroid :

1- do backup of all files on your phone (even sdcard content)
2- download the latest fastboot rom for mi4c from http://en.miui.com/a-234.html ("libra_images_V8.2.3.0.NXKCNEC_20170407.0000.00_7.0_cn_65308fae52.tgz")
3- install this rom via fastboot and "wipe all"
4- download latest TWRP Recovery for mi4c https://www.androidfilehost.com/?fid=457095661767135741 (will install TWRP 3.0.3)
5- flash recovery via fastboot
6- reboot to recovery and copy our ROM to your phone (installed rom "globeROM_v8_libra_V8.2.3.0.NXKCNEC_cfg-ssg")
7- install our ROM without problems

My actions after install:
Download SuperSU 2.79 and install with TWRP.

I've attached the log file, if it can help. Don't waste your time on my case, i think it'll be ok. Rom is installed, seems clean, and i got root acces with SU zip file.

Thanks for your job and your help !
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