Rollback ROM - Lenovo ZUK Z2 (Plus) Questions & Answers

Hi guys,
I just want to know if it is safe to go back from ZUI-2.5.334(Chinese) to 2.0.093(Indian)
I do not have any custom recovery or root, i am planing to go back using QFIL.

this link if it is helpful.
http://thinkflag.blogspot.in/2017/04/lenovo-z2-plus-official-nougat-update.html

I rolled up with QPST and it was fine, i am now with the Indian ROM (ZUI 2.0.093). These Chinese phones are amazing hard brick is a joke with them (on LG and Samsung its a nightmare trust me. I had a really long nightmare with LG phones especially the G2 where you need to short pins on the motherboard and with the famous LG G4 where i was inventing a solution :crying: :crying: :crying: )

In my opinion, you unlock bootloader first, then you flash custom recovery. Now, you can flash any rom over recovery.

Related

new to lg g3 questions

hi guys im new to the lg g3 (well any lg phone) just a couple of questions
from what ive read there isnt many roms due to the locked bootloader will the bootloader be unlocked in the future?
i have the D855 uk vodafone model is they a working TWRP or CWR for the g3?
ive rooted so does this mean i can at least remove some bloteware?
thanks guys sorry for questions :victory:
from what ive read there isnt many roms due to the locked bootloader will the bootloader be unlocked in the future?
Probably yes, if the @thecubed and others beat the protection (last post - http://forum.xda-developers.com/ver...3-vs98510b-t2890349/post55729952#post55729952)
i have the D855 uk vodafone model is they a working TWRP or CWR for the g3?
There is only Tethered version and I would not recommend to use it. It's for advanced users only and it's not a "real" recovery. More on http://forum.xda-developers.com/lg-g3/general/recovery-twrp-2-7-1-3-t2831668
ive rooted so does this mean i can at least remove some bloteware?
Yes, you can... , or freeze it. If you will the cause softbrick, use LG Flash Tool 2014 and flash in NORMAL mode latest stock ROM you used or use LG PC Suite. After this you need to re-root it. (http://forum.xda-developers.com/lg-g3/general/guide-unroot-ota-using-lg-pc-suite-pc-t2802286)
shaarky said:
from what ive read there isnt many roms due to the locked bootloader will the bootloader be unlocked in the future?
Probably yes, if the @thecubed and others beat the protection (last post - http://forum.xda-developers.com/ver...3-vs98510b-t2890349/post55729952#post55729952)
i have the D855 uk vodafone model is they a working TWRP or CWR for the g3?
There is only Tethered version and I would not recommend to use it. It's for advanced users only and it's not a "real" recovery. More on http://forum.xda-developers.com/lg-g3/general/recovery-twrp-2-7-1-3-t2831668
ive rooted so does this mean i can at least remove some bloteware?
Yes, you can... , or freeze it. If you will the cause softbrick, use LG Flash Tool 2014 and flash in NORMAL mode latest stock ROM you used or use LG PC Suite. After this you need to re-root it. (http://forum.xda-developers.com/lg-g3/general/guide-unroot-ota-using-lg-pc-suite-pc-t2802286)
Click to expand...
Click to collapse
thanks for the replys if the bootloader doesnt get unlocked then thats going to destroy the g3 for development isnt it
is they a way to flash latest stock rom and get off the vodafone branded rom so i at least get all the latest OTAs?
Not sure I understand you question, but if you mean, whether you will be able to update the phone via OTA in the future, it depends.
If not or if it will not work, unroot your phone, install OTA and the re-root and you should be fine.
But still - all of that is already described in dedicated threads, don't be afraid to take a look around. :fingers-crossed:
As for the development - I guess when it will not get unlocked, it will be from my perspective one of the most wasted money on Android phone for many.
http://forum.xda-developers.com/lg-g3/general/petition-possibility-to-unlock-t2832032 --> https://www.change.org/p/lg-electro...opportunity-to-unlock-bootloader-in-lg-phones (actually just ~8500 of us)
shaarky said:
Not sure I understand you question, but if you mean, whether you will be able to update the phone via OTA in the future, it depends.
If not or if it will not work, unroot your phone, install OTA and the re-root and you should be fine.
But still - all of that is already described in dedicated threads, don't be afraid to take a look around. :fingers-crossed:
Click to expand...
Click to collapse
lol sorry what i ment is im on a vodafone branded firmware now and i wanted to flash a unbranded latest uk stock rom so it will be first to get OTA as branded firmwares can be a bit behind is it possible?
thanks again:good:
I don't think so, but someone else should confirm it.
Eg. you can download FW based on IMEI (http://lg-firmware-rom.com/download-firmware.php?f=YOUR_IMEI_HERE), not based on whether it's branded or not.
But still you have option to use the tools like LG Flash Tool 2014 and simply flash latest firmware you want (for your variant)
shaarky said:
I don't think so, but someone else should confirm it.
Eg. you can download FW based on IMEI (http://lg-firmware-rom.com/download-firmware.php?f=YOUR_IMEI_HERE), not based on whether it's branded or not.
But still you have option to use the tools like LG Flash Tool 2014 and simply flash latest firmware you want (for your variant)
Click to expand...
Click to collapse
hi im downloading latest firmware from here http://forum.xda-developers.com/showthread.php?t=2799647
so can i flash this via lg flash tool or is this not a KDZ?
brockyneo said:
hi im downloading latest firmware from here http://forum.xda-developers.com/showthread.php?t=2799647
so can i flash this via lg flash tool or is this not a KDZ?
Click to expand...
Click to collapse
Also have a look in here http://forum.xda-developers.com/showthread.php?t=2791761
I am on three UK but I flashed v10j a long time ago and am happy with it.
Sent from my LG-D855 using Tapatalk
brockyneo said:
hi im downloading latest firmware from here http://forum.xda-developers.com/showthread.php?t=2799647
so can i flash this via lg flash tool or is this not a KDZ?
Click to expand...
Click to collapse
I know its confusing but you can only flash TOT files with that tool - if you get your FW via the imei cause its a KDZ, for KDZ flashing you need to use this tool...
http://forum.xda-developers.com/showthread.php?t=2785089

Help new to this!

Hi guys and girls i am from the uk (england) and got my g4 about 4 months ago.
Fed up of lg's stock rom and how its very laggy and irritating to use now.
I have been looking everywhere about rooting the phone and installing custom roms to make it much better and more enjoyable to use.
But i am stuck i dont know whats the best way of rooting this phone i have tried booting it into stock recovery mode but it just dont work.
so can you guys please point me to a right good method of rooting and installing custom roms please?
Currently using android 5.1 on lg stock rom
Many thanks!
Take it that is a no haha
Well every phone has a different model number so I can be hard I soft bricked my phone were system ui stopped finally got bliss pop running I would go for cyanamod 12 or something
mrnoxx said:
Take it that is a no haha
Click to expand...
Click to collapse
Have you unlocked your bootloader ?
No not too sure how to do that. Any good threads you guys reccomend.
Many thanks
So I know this is scary for you and because it is something new, therefore be sure that you want to live with the responsability if something goes wrong.
Now, the next forum thread tells you how to flash an already rooted image BUT, and this is very important, this works only if you have the version 10c installed (Check in About Phone>Software Version)
http://forum.xda-developers.com/g4/orig-development/root-tmo-vzw-intl-variants-soon-root-lg-t3164765
If you have the latest version of the software (20a) the best thing is to unlock your bootloader, void your warranty in the process, and flash a custom recovery. After that, you just need to flash the SuperSu zip file and you will have root.
To flash custom ROMs, just access recovery and flash the zip file of your ROM.
I'm using the unofficial CM13.0 and works very good for me, but I do miss the official camera app.
Thankyou very much for your advice okarr. Will look into this

Cannot Unroot/Stock! LG Suport Tool stuck at 4%. LG Flash Tool Stopped due an error

Hey Folks! I need help!
First sorry for my english, im from brazil.
I'm a Lawyer and i'm gonna sue LG company for a hardware problem ( SIM CARD REMOVED PROBLEM ). But my LG G3 have LG 6.0 Stock rom installed. I tried to root with King Root, it failed, but now even if i hard reset the phone it keeps installed!
(in brazil unlike USA, the company's don't support the costumer. They have given 1 year guarantee, i have the phone for 1 year and 1 month. They told can't help me but the brazilian Law says that if a unkown hardware problem appears then you have 90 days to sue the company.)
So i want to Go back to stock 4.4 ou 5.0, so if the judge need to avaliate, at least it will be known as unmodified.
When i updated to 6.0 Stock, i did with LG Flash tool 2014.
So i tried again to downgrade with LG Flash tool, but using the 20x kdz. I tried diferrent KDZ. My phone is D855P, tried D855 normal KDZ, tried 855P KDZ. but downgrade always failed " due to an error " on flash tool.
So i tried LG support Tool, gone do Download mode, but it stucks at 4%. ( and yes i tried to hard reset before starts the procedure.)
Someone can help me to unroot(i don't think is unrooted, but King root remain on the phone as a bloatware now), or return to 4.4 ou 5.0 stock?
thanks!:good:
Assuming you able to boot the phone, try to downgrade using LGUP instead lg flash tools
Sent from my LG-D855 using Tapatalk
wiwid.colgate said:
Assuming you able to boot the phone, try to downgrade using LGUP instead lg flash tools
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
I was thinking about. As i already use "stock rom 6.0" and i just figured out how to uninstall "king root app". So now my Phone looks clean from bloatware. Guess now i can sue the company without being afraid of someone detect some mod on the smartphone.

Installing a LG G3 ROM today

Hello guys,
I have a LG G3 d855 EUR (i live in Italy) stock firmware V30c-EUR-XX, no root, no custom rom.
Since i'm pretty new to Android modding, i want to ask for your help because i would install the best custom rom available for my device.
So, which is the best rom? Can i have a step by step tutorial for rooting my device and installing the rom?
I would like to maintain the stock camera quality, i've heard that custom roms may decrease the overall photos quality.
Thanks in advance, i really appreciate your help. :good:
NichyXD said:
Hello guys,
I have a LG G3 d855 EUR (i live in Italy) stock firmware V30c-EUR-XX, no root, no custom rom.
Since i'm pretty new to Android modding, i want to ask for your help because i would install the best custom rom available for my device.
So, which is the best rom? Can i have a step by step tutorial for rooting my device and installing the rom?
I would like to maintain the stock camera quality, i've heard that custom roms may decrease the overall photos quality.
Thanks in advance, i really appreciate your help. :good:
Click to expand...
Click to collapse
Hello, since this is General.. Question shouldn't post here but anyway, have you heard Fulmics? It is developed by xpirt and will transform your G3 to G5..
You can use that ROM because it is the most reliable ROM i'll ever use on my G3.. Don't worry about the camera quality since it is stock based ROM, you won't lose anything..
Please note that my G3 is korean variant ( F400L ) and not international ( D855 ).. So my choices is a bit limited here.. Don't worry tho because Fulmics support most variant of G3's..
Let's Start!
How to root? First you need to go back to Lollipop, How? If Sony, there is Flashtool but with LG, we can use LGUP and flash the stock kdz/tot there.. Please download the right kdz for your device btw..
And there is many ways to root such as Kingroot or OneClick..
Note that, if you're using Kingroot.. Don't mind about their bloatware because we're going to update to Marshmallow anyway..
After it is done, you need to install TWRP.. You're so lucky because there are many way to install TWRP and the most easiest way is using AutoRec
( BEWARE, IF YOU INSTALLED THE WRONG VARIANT FOR YOUR DEVICES..THIS MAY LEAD TO HARD BRICK! )
AutoRec can be downloaded from Playstore, you need to find the right one for example.. You got D855, so you need to download Autorec Lollipop for D855.. Don't install the one for F400 or else, goodbye to your G3 forever.. Yup, easiest way can be the most risky way to go..
While busy with rooting and installing recovery, download the ROM you want.. As example, download the latest Fulmics 6.9 ROM for G3 and transfer it to root directory of your SD Card..
After you have TWRP installed, boot to TWRP.. If you found it is hard to boot to recovery with those stupid combination key.. Just download an apps called ... Boot.... hmm.. whatever it is.. I'll forgot, just find an apps that can help you boot to recovery easily i guess..
If you succeed to boot to recovery, congratulation.. Now do wipe data cache and install the ROM ( Fulmics 6.9 as example ).. After that, reboot the device and enjoy!
Since my G3's is already dead a long time ago ( bluescreen and flicker ), that's all i can help by typing all of this using my G4.. Goodluck!
daniLaLaLaLaLa said:
Hello, since this is General.. Question shouldn't post here but anyway, have you heard Fulmics? It is developed by xpirt and will transform your G3 to G5..
You can use that ROM because it is the most reliable ROM i'll ever use on my G3.. Don't worry about the camera quality since it is stock based ROM, you won't lose anything..
Please note that my G3 is korean variant ( F400L ) and not international ( D855 ).. So my choices is a bit limited here.. Don't worry tho because Fulmics support most variant of G3's..
Let's Start!
How to root? First you need to go back to Lollipop, How? If Sony, there is Flashtool but with LG, we can use LGUP and flash the stock kdz/tot there.. Please download the right kdz for your device btw..
And there is many ways to root such as Kingroot or OneClick..
Note that, if you're using Kingroot.. Don't mind about their bloatware because we're going to update to Marshmallow anyway..
After it is done, you need to install TWRP.. You're so lucky because there are many way to install TWRP and the most easiest way is using AutoRec
( BEWARE, IF YOU INSTALLED THE WRONG VARIANT FOR YOUR DEVICES..THIS MAY LEAD TO HARD BRICK! )
AutoRec can be downloaded from Playstore, you need to find the right one for example.. You got D855, so you need to download Autorec Lollipop for D855.. Don't install the one for F400 or else, goodbye to your G3 forever.. Yup, easiest way can be the most risky way to go..
While busy with rooting and installing recovery, download the ROM you want.. As example, download the latest Fulmics 6.9 ROM for G3 and transfer it to root directory of your SD Card..
After you have TWRP installed, boot to TWRP.. If you found it is hard to boot to recovery with those stupid combination key.. Just download an apps called ... Boot.... hmm.. whatever it is.. I'll forgot, just find an apps that can help you boot to recovery easily i guess..
If you succeed to boot to recovery, congratulation.. Now do wipe data cache and install the ROM ( Fulmics 6.9 as example ).. After that, reboot the device and enjoy!
Since my G3's is already dead a long time ago ( bluescreen and flicker ), that's all i can help by typing all of this using my G4.. Goodluck!
Click to expand...
Click to collapse
Thank you very much for your help! I'll try this ASAP... I'll let you know about the progress.
Thanks for your time too.
daniLaLaLaLaLa said:
Hello, since this is General.. Question shouldn't post here but anyway, have you heard Fulmics? It is developed by xpirt and will transform your G3 to G5..
You can use that ROM because it is the most reliable ROM i'll ever use on my G3.. Don't worry about the camera quality since it is stock based ROM, you won't lose anything..
Please note that my G3 is korean variant ( F400L ) and not international ( D855 ).. So my choices is a bit limited here.. Don't worry tho because Fulmics support most variant of G3's..
Let's Start!
How to root? First you need to go back to Lollipop, How? If Sony, there is Flashtool but with LG, we can use LGUP and flash the stock kdz/tot there.. Please download the right kdz for your device btw..
And there is many ways to root such as Kingroot or OneClick..
Note that, if you're using Kingroot.. Don't mind about their bloatware because we're going to update to Marshmallow anyway..
After it is done, you need to install TWRP.. You're so lucky because there are many way to install TWRP and the most easiest way is using AutoRec
( BEWARE, IF YOU INSTALLED THE WRONG VARIANT FOR YOUR DEVICES..THIS MAY LEAD TO HARD BRICK! )
AutoRec can be downloaded from Playstore, you need to find the right one for example.. You got D855, so you need to download Autorec Lollipop for D855.. Don't install the one for F400 or else, goodbye to your G3 forever.. Yup, easiest way can be the most risky way to go..
While busy with rooting and installing recovery, download the ROM you want.. As example, download the latest Fulmics 6.9 ROM for G3 and transfer it to root directory of your SD Card..
After you have TWRP installed, boot to TWRP.. If you found it is hard to boot to recovery with those stupid combination key.. Just download an apps called ... Boot.... hmm.. whatever it is.. I'll forgot, just find an apps that can help you boot to recovery easily i guess..
If you succeed to boot to recovery, congratulation.. Now do wipe data cache and install the ROM ( Fulmics 6.9 as example ).. After that, reboot the device and enjoy!
Since my G3's is already dead a long time ago ( bluescreen and flicker ), that's all i can help by typing all of this using my G4.. Goodluck!
Click to expand...
Click to collapse
Are you sure there is no QFUSE which is blown when you downgrade? Because i've read and heard about it. It's dangerous to downgrade, someone got stuck on 5% and had the secure boot error which is an indication of QFUSE.
西村大一 said:
Are you sure there is no QFUSE which is blown when you downgrade? Because i've read and heard about it. It's dangerous to downgrade, someone got stuck on 5% and had the secure boot error which is an indication of QFUSE.
Click to expand...
Click to collapse
The downgrade is mandatory for rooting the device, right? Is there a root for Android 6.0 too? :/
I'm a bit confused...
西村大一 said:
Are you sure there is no QFUSE which is blown when you downgrade? Because i've read and heard about it. It's dangerous to downgrade, someone got stuck on 5% and had the secure boot error which is an indication of QFUSE.
Click to expand...
Click to collapse
I've done that a lot of time with my G3.. No QFUSE problem here and this is the first time i've heard that.. What is QFUSE?
NichyXD said:
The downgrade is mandatory for rooting the device, right? Is there a root for Android 6.0 too? :/
I'm a bit confused...
Click to expand...
Click to collapse
I am not aware of any root method for V30 based roms but there could very well be.
daniLaLaLaLaLa said:
I've done that a lot of time with my G3.. No QFUSE problem here and this is the first time i've heard that.. What is QFUSE?
Click to expand...
Click to collapse
QFUSE was supposed to be a downgrade protection which triggers when someone flashes in download mode a version of android lower than the current one. I have no idea why, if you access the hidden menu, and find DRM, you find QFUSE there. It was supposed to, like said before, be a fuse which is triggered by a downgrade.

unlock bootloader lg d686 without bootloop

well i was flashing genesis rom g3 on my lg d686 but it went to boot loop and then i reflash stock firmware using lg suit.. but i want to flash the custom rom and i dont know how should i install rom on lg d686,
i know....... u r thinking that i dont know how to install the roms but earlier i have used nokia xl, x, x2, samsung s advance, moto g, g2, and moto e and right now i m using moto e2 otus with android 7.1.1 but i have lg d686 too, and i want to make this phone more lite so this phone won't be leging anymore.....
please make any new rom which can be easily flashable on this phone
and also tell the easiest way to unlock bootloader..
Thank you
sltushar said:
well i was flashing genesis rom g3 on my lg d686 but it went to boot loop and then i reflash stock firmware using lg suit.. but i want to flash the custom rom and i dont know how should i install rom on lg d686,
i know....... u r thinking that i dont know how to install the roms but earlier i have used nokia xl, x, x2, samsung s advance, moto g, g2, and moto e and right now i m using moto e2 otus with android 7.1.1 but i have lg d686 too, and i want to make this phone more lite so this phone won't be leging anymore.....
please make any new rom which can be easily flashable on this phone
and also tell the easiest way to unlock bootloader..
Thank you
Click to expand...
Click to collapse
You can find root for your device under XDA forums. It will be some kind of script file. When you run script, it will automatically unlock your bootloader. After that, you need to flash custom recovery. After this point, you are able to install custom roms. Remember, gather all necessary files before doing anything e.g. Your device kdz firmware or tot firmware files.
dear sir i tried and i stuck on boot, so please guide me with the tutorial
its been hard to flash any custom rom on this device
my model is d686 , its not d680
so try to give a simple tutorial to flash rom this device, its very hard to boot into recovery menu and secondly the recovery menu appears only once because after flashing the rom i stuck on boot logo and nothing else
please help me
and also make any rom which is suitable for this device so we can install on it and use it without legging
thank you
Honestly in the long run getting a newer phone like a nexus 6 will fair better. This phone was an absolute pain for me to manage and ROMs were always crashing left and right. After switching to a nexus 6 I do not regret it.

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