[Q] LG G FLEX 2 Downgrade - How to? - LG G Flex 2

Hi
I have a LG FLEX 2 on firmware version 5.1.1 [H955] , I am looking to downgrade the device to 5.01 .
Current software version: 15a-234-15 .
The reason why I am looking to downgrade is:
a) Root
b) My unlock counter has been permenantley locked - I can directly unlock this as I have the relevant software/hardware - but phone needs to be on the lower version first.
Do i flash with software version 10e? If no which firmware version do I use - Since my handset is GSM/UK Spec - LG Flash Tool 2014 asks to select whether it is cdma or something else . . . During this option do i select the cdma option??
Regards
Dan

dany1849 said:
Hi
I have a LG FLEX 2 on firmware version 5.1.1 [H955] , I am looking to downgrade the device to 5.01 .
Current software version: 15a-234-15 .
The reason why I am looking to downgrade is:
a) Root
b) My unlock counter has been permenantley locked - I can directly unlock this as I have the relevant software/hardware - but phone needs to be on the lower version first.
Do i flash with software version 10e? If no which firmware version do I use - Since my handset is GSM/UK Spec - LG Flash Tool 2014 asks to select whether it is cdma or something else . . . During this option do i select the cdma option??
Regards
Dan
Click to expand...
Click to collapse
Everything is here, http://forum.xda-developers.com/g-flex2/general/guide-lg-g-flex-2-stock-firmware-to-t3037593

is there any way to downgrade a LG g flex 2 from 5.1.1 to 5.0.1?

willy242 said:
is there any way to downgrade a LG g flex 2 from 5.1.1 to 5.0.1?
Click to expand...
Click to collapse
Which model are you asking? H955, H950, H959 or LS996.

Ls996

admee2k13 said:
Ls996
Click to expand...
Click to collapse
if you read the forums there is no way to downgrade.
Why would you like to downgrade?
This LS996 with the latest software runs like a charm no more overheating like in ZV5 (5.0.1)

I was using the ls996 as an example. I know the sprint model can't be downgraded but hopefully anyone else who reads this also know.

Related

I have a LG G Stylo (Canadain) modle number LG-H636

I have a LG G Stylo (Canadain) modle number LG-H636
i rooted mt phone and after a day i unrooted it . Now when i try to update my phone it wont update cz it say its suspected of rooting.
How can i flash the stock rom for this phone ? and where can i download the stock rom for this model ?like how can i get it back to normal and then update ? plz help
What provider are you with?
If it's a Fido phone, there is a KDZ available
Do you have 5.1 or 5.0 on fido ? With videotron, we're stuck a 5.0 and it's full of bug and very laggy.
mana4.com said:
Do you have 5.1 or 5.0 on fido ? With videotron, we're stuck a 5.0 and it's full of bug and very laggy.
Click to expand...
Click to collapse
5.1.1 is available, but I haven't updated. I am not able to attain root and don't wish to make it harder with an update. Otherwise, the system runs stable at 5.0.2
I have 5.0.2 and don't notice many bugs if any. Battery life is excellent l, 2-3 days if not used much.
I have a fido lg Stylo h636 and want to update too but I've rooted with king root. What a mistake because now I can't update. Any fix for this?
wind
fearhq said:
If it's a Fido phone, there is a KDZ available
Click to expand...
Click to collapse
im with but this phone is unlocked is there any way i can get it to work ?
with wind
asidorowicz said:
What provider are you with?
Click to expand...
Click to collapse
im with wind bu my phone is unlocked
unknownshake said:
im with wind bu my phone is unlocked
Click to expand...
Click to collapse
Use this link, but replace "IMEI" with your imei. You can get it by dialing *#06#. This should give you a link to a kdz file
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=IMEI
unknownshake said:
im with but this phone is unlocked is there any way i can get it to work ?
Click to expand...
Click to collapse
fearhq said:
If it's a Fido phone, there is a KDZ available
Click to expand...
Click to collapse
asidorowicz said:
Use this link, but replace "IMEI" with your imei. You can get it by dialing *#06#. This should give you a link to a kdz file
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=IMEI
Click to expand...
Click to collapse
there is a H636 KDZ files , so i believe i do will be safe if you give it a shot about trying either of the Root Methods and if you manage to get Root access someone from the Stylo scene can help and port TWRP for you guys.
KDZ can be found in my thread (Thanks @asidorowicz for the KDZ download link)
http://forum.xda-developers.com/android/development/read-trying-to-root-kdz-files-kdz-tmo-t3152531/
help
DrakenFX said:
there is a H636 KDZ files , so i believe i do will be safe if you give it a shot about trying either of the Root Methods and if you manage to get Root access someone from the Stylo scene can help and port TWRP for you guys.
KDZ can be found in my thread (Thanks @asidorowicz for the KDZ download link)
http://forum.xda-developers.com/android/development/read-trying-to-root-kdz-files-kdz-tmo-t3152531/
Click to expand...
Click to collapse
So if i use the fido KDZ will it work on my phone ? is it safe ?
unknownshake said:
So if i use the fido KDZ will it work on my phone ? is it safe ?
Click to expand...
Click to collapse
KDZ are like Factory Device Restore File, having the KDZ is like a having a Doctor next to you when come to Un-brick/Full Restore/Unroot you device , I don't know which LP version this KDZ is but if this v10i is 5.1.1. and you are on 5.0.2 you'll be like Updating your device to the Latest android/software available on your carrier.
Use @GameTheory. Unbrick Guide can be found here http://androidcreations.weebly.com/lg-g-stylo.html
10k
DrakenFX said:
KDZ are like Factory Device Restore File, having the KDZ is like a having a Doctor next to you when come to Un-brick/Full Restore/Unroot you device , I don't know which LP version this KDZ is but if this v10i is 5.1.1. and you are on 5.0.2 you'll be like Updating your device to the Latest android/software available on your carrier.
Use @GameTheory. Unbrick Guide can be found here http://androidcreations.weebly.com/lg-g-stylo.html
Click to expand...
Click to collapse
My version is not 10i mine is 10K. will ur method still work ?
unknownshake said:
My version is not 10i mine is 10K. will ur method still work ?
Click to expand...
Click to collapse
doesn't matter which version you have the KDZ method (which is not mine btw ) will still work but in this case i don't know if v10K is actually a better update than v10i.
Edit: @unknownshake
The v10k KDZ is been release check my KDZ link from preview post if you need to download
there is no update
DrakenFX said:
doesn't matter which version you have the KDZ method (which is not mine btw ) will still work but in this case i don't know if v10K is actually a better update than v10i.
Edit: @unknownshake
The v10k KDZ is been release check my KDZ link from preview post if you need to download
Click to expand...
Click to collapse
i reostred my phone using the method u tolled me before , and i restored it to the version 10i. But the andriod version is still on 5.0.2 everytime i check for update it say there is no update. isnt there 5.1.1 update for this ?
if i want to restore my phone again can i install the 10j version on it ? mine is the Canadian version phone.
unknownshake said:
i reostred my phone using the method u tolled me before , and i restored it to the version 10i. But the andriod version is still on 5.0.2 everytime i check for update it say there is no update. isnt there 5.1.1 update for this ?
if i want to restore my phone again can i install the 10j version on it ? mine is the Canadian version phone.
Click to expand...
Click to collapse
try using the v10k KDZ that's the latest software firmware for you device,
P.S. i don't know which LP version is v10k but i know is the latest release.
cant downlaod it
DrakenFX said:
try using the v10k KDZ that's the latest software firmware for you device,
P.S. i don't know which LP version is v10k but i know is the latest release.
Click to expand...
Click to collapse
its not downloading , when i click on v10k it jus opens a blank page.
unknownshake said:
its not downloading , when i click on v10k it jus opens a blank page.
Click to expand...
Click to collapse
give it a try now is working for both H636 (Canadian Stylo) KDZ's
its downloading now
DrakenFX said:
give it a try now is working for both H636 (Canadian Stylo) KDZ's
Click to expand...
Click to collapse
Thank You , its downloading now. one more question , will i b able to update my phone by OTA after i i restore my phone using this ?
unknownshake said:
Thank You , its downloading now. one more question , will i b able to update my phone by OTA after i i restore my phone using this ?
Click to expand...
Click to collapse
YES, using KDZ method will erase all/every trace of root/custom recovery and all that so you'll be able to get OTA's

i have D850 or D855. which model i have.

I just got used lg g3 D850 (in software details) but on identification sticker on back side it says D855... But IMEI is same in software and on sticker.
I cant see the android update option available in setting menu and its running android 4.4.2 version with build number KVT49L.D85010D.
I need to know which model i have in my hands and how to identify it.
Thanks and advance.
Build Number means nothing here. But if software imei matches the back sticker that says it's a D855 that is confusing but most likely it's a D855. But I'd return something like that.
Sent from my VS986 using Tapatalk
@hyelton thanks for reply. .
is there any possibility to install d850 firmware with att logo on d855?
I can't find the option to check ota update.. what about this?
aftab1003 said:
@hyelton thanks for reply. .
is there any possibility to install d850 firmware with att logo on d855?
I can't find the option to check ota update.. what about this?
Click to expand...
Click to collapse
First you need to find out its real model first.. Why would you want to flash D850 firmware? Its already running it from your build #

question about the lg g flex 2 h959

I just got it yesterday and I look around the forum and notice that there's nearly any rom out for my model.
I'm currently running v10b 5.0.1 and this phone gets lag sometimes.
I was wondring if I can update this model to a newer version .
Tnx.
Should update to 5.1.1
guy6136206 said:
I just got it yesterday and I look around the forum and notice that there's nearly any rom out for my model.
I'm currently running v10b 5.0.1 and this phone gets lag sometimes.
I was wondring if I can update this model to a newer version .
Tnx.
Click to expand...
Click to collapse
Should OTA to 15C. 5.1.1
내 LG G4 H815 USA사용 tapatalk에서 전송
ako2k7 said:
Should update to 5.1.1
Click to expand...
Click to collapse
rogconnect said:
Should OTA to 15C. 5.1.1
내 LG G4 H815 USA사용 tapatalk에서 전송
Click to expand...
Click to collapse
Okay it should but mine doesn't, where can I download this update from?
And one more question why does this phone doesn't have recovery?
Because Bootloader is closed
francescrm said:
Because Bootloader is closed
Click to expand...
Click to collapse
Please tell me that I can open the bootloader or at least download and install the update...
No, you can't, unless you are LG's director.
You will have to serch for update, I have H955 so don't know much about you device type.
francescrm said:
No, you can't, unless you are LG's director.
You will have to serch for update, I have H955 so don't know much about you device type.
Click to expand...
Click to collapse
i found this
http://guidebelajar.blogspot.co.il/2015/11/guide-flash-firmware-lg-g-flex-2.html
but now i have a problem with the lg flash tool, it stuck on 2% in the s/w update,
any idea how to fix this????
the 5.0.1 is very laggy and annoying.
tnx.
Well,i have H955 version and had 5.1.1 from beginning (although i received some fix update shortly after). Try it thru OTA update,that should work always

G flex 2 korean version updated to 6.0.1

Follow the link :
http://m.ppomppu.co.kr/new/bbs_view.php?id=phone&no=3201270&page=1
Update te korean device via lg pc suite , it will take 30-40 minutes to get updated !!
http://forum.xda-developers.com/showthread.php?p=67257040
Tapnięte.
Is there any way we can update the AT&T H950 variant to this Korean update?
According to a Chinese forum, http://bbs.angeeks.com/thread-3956441-1-11.html
H959(32G) is the same as F510k, they can cross flash the kdz.
But there is no kdz for F510 on the internet.
none from korea here to share experience ?
Well, at least it's happening. Just be patient, we waited for so long and I don't think a few more days will be a problem.
Ahmedt7866 said:
Is there any way we can update the AT&T H950 variant to this Korean update?
Click to expand...
Click to collapse
Do not try it even if tot or kdz is available for that..
H950 has qfuse set and anything that is qfuse<1 ie 0 will hard brick the device..
I just hope that there will be some exploit that can give us custom recovery and kernel someday..
However kernel hijacking is a possibility but devs with enough knowledge arent interested in this device ...
Also MM may not have root simply also due to dm_verity in kernel..
For us h950 users outside USA there may never be a MM either...
I was wondering if we all take it to twitter to demand a solution for custom kernel bombing their twitter we may get a good response
We can even say our devices heat up so much that it reaches temp of 60-70+ so we need to modify vdd freely for all g flex 2...
They may acknowledge the sd810 problem and send a method to unlock all variants..
What do u say guys?
Sent from my LG-H950 using XDA-Developers mobile app
adds08 said:
Do not try it even if tot or kdz is available for that..
H950 has qfuse set and anything that is qfuse<1 ie 0 will hard brick the device..
I just hope that there will be some exploit that can give us custom recovery and kernel someday..
However kernel hijacking is a possibility but devs with enough knowledge arent interested in this device ...
Also MM may not have root simply also due to dm_verity in kernel..
For us h950 users outside USA there may never be a MM either...
I was wondering if we all take it to twitter to demand a solution for custom kernel bombing their twitter we may get a good response
We can even say our devices heat up so much that it reaches temp of 60-70+ so we need to modify vdd freely for all g flex 2...
They may acknowledge the sd810 problem and send a method to unlock all variants..
What do u say guys?
Sent from my LG-H950 using XDA-Developers mobile app
Click to expand...
Click to collapse
you have my support by twittering them all day long if it will help
What about PR Versions, can't we get H950PR Marshmallow after being released and flash it over the existing 5.1.1 ???
https://drive.google.com/file/d/0B0UblGbOPFYBTWJ4OFgzN29Wemc/view?usp=drivesdk
System dump of F510l v20b
kjub said:
you have my support by twittering them all day long if it will help
Click to expand...
Click to collapse
Thanks man bt if 100 ppl do it for atleast 4hr itd be great.. A smartphone world twitter revolution.. XD
mkhman said:
What about PR Versions, can't we get H950PR Marshmallow after being released and flash it over the existing 5.1.1 ???
Click to expand...
Click to collapse
No even ATT PR has no qfuse set.. ATT 5.1.1 has qfuse so not possible..
Will result in infamous q9008 brick..
kevin3688 said:
https://drive.google.com/file/d/0B0UblGbOPFYBTWJ4OFgzN29Wemc/view?usp=drivesdk
System dump of F510l v20b
Click to expand...
Click to collapse
Wow ..someone already dumped the system..
Bt no use right now for other variants..
Maybe like v10 lg will include oem unlock for h955 euro but what of us
Sent from my LG-H950 using XDA-Developers mobile app
kevin3688 said:
https://drive.google.com/file/d/0B0UblGbOPFYBTWJ4OFgzN29Wemc/view?usp=drivesdk
System dump of F510l v20b
Click to expand...
Click to collapse
2.84GB unpacked, is it just me or its much smaller than 5.1.1?
adds08 said:
Thanks man bt if 100 ppl do it for atleast 4hr itd be great.. A smartphone world twitter revolution.. XD
No even ATT PR has no qfuse set.. ATT 5.1.1 has qfuse so not possible..
Will result in infamous q9008 brick..
Wow ..someone already dumped the system..
Bt no use right now for other variants..
Maybe like v10 lg will include oem unlock for h955 euro but what of us
Sent from my LG-H950 using XDA-Developers mobile app
Click to expand...
Click to collapse
What about flashing H950PR Marshmallow over H950 V. 5.0.1 ????? is it applicable ???
F510L20b_00_0519.kdz
http://pkg02.xcdn.gdms.lge.com/dn/downloader.dev?fileKey=FW4DNGN5523KA7U784EFRMQ/F510L20b_00_0519.kdz
For LG F510L Only.
mkhman said:
What about flashing H950PR Marshmallow over H950 V. 5.0.1 ????? is it applicable ???
Click to expand...
Click to collapse
i dont know if it works, i see in another thread someone asking for flash h955 over f510l and the only thing they say is the modem driver maybe dont work, you will dont have network connection...but maybe the rom works.
Now we only need a rooted image.
baggerbodo said:
Now we only need a rooted image.
Click to expand...
Click to collapse
U wont root Marshmallow on Flex 2.
baggerbodo said:
Now we only need a rooted image.
Click to expand...
Click to collapse
Flash only the system.img, the phone won't boot.
Unless you know how?
mkhman said:
What about flashing H950PR Marshmallow over H950 V. 5.0.1 ????? is it applicable ???
Click to expand...
Click to collapse
Yes that is applicable.. But don't downgrade att 5.1.1 to 5.0.1
Downgrade for att 5.1.1 is not possible whatsoever
Sent from my LG-H950 using XDA-Developers mobile app
I saw a few disappointments ahead when it's fully realised that without a unlocked boot loader we can't root marshmallow.

Lg g4 at&t anti-rollback non-fusing device

I have a LG G4 at&t variant which I purchased from AliExpress as a refurbished. I did confirm from the board that it is a original H810 version and also the IMEI checks out.
I have read about bootloader being locked but when I check the status of my anti-rollback I see that it says ANTI-ROLLBACK VERSION NON-FUSING DEVICE.
I did a lot of Google searches and I find no results detailing this. Some people have V1 V2 or V3 but mine doesnt show any number.
I have attached screenshots in the OP.
Please any help or explanation will be appreciated
hypafly said:
I have a LG G4 at&t variant which I purchased from AliExpress as a refurbished. I did confirm from the board that it is a original H810 version and also the IMEI checks out.
I have read about bootloader being locked but when I check the status of my anti-rollback I see that it says ANTI-ROLLBACK VERSION NON-FUSING DEVICE.
I did a lot of Google searches and I find no results detailing this. Some people have V1 V2 or V3 but mine doesnt show any number.
I have attached screenshots in the OP.
Please any help or explanation will be appreciated
Click to expand...
Click to collapse
That's because your running the original unupdated software version. There's nothing to downgrade to.
Sent from my iPhone using Tapatalk
Thank you for your reply. But I don't think that's the case, because I have upgraded to official marshmallow H81020n and I downgraded back to H81010o. More than once. And even in marshmallow I still have the same NON-FUSING DEVICE in the ANTI-ROLLBACK VERSION.
Lg g4 at&t anti-rollback non-fusing device
hypafly said:
Thank you for your reply. But I don't think that's the case, because I have upgraded to official marshmallow H81020n and I downgraded back to H81010o. More than once. And even in marshmallow I still have the same NON-FUSING DEVICE in the ANTI-ROLLBACK VERSION.
Click to expand...
Click to collapse
Upgrade to 21y that will be the only way to know. There's an update or two for MM that you can still be able to downgrade before antirollback Version changes.
But be careful a lot of people have issues with 21y. And I'm 100% sure you won't be able to downgrade from it.
Edit: Interesting found Another instance of the non-fusion device and it was a T-Mobile model. But it is unique
Sent from my iPhone using Tapatalk
Does this mean that maybe if I upgrade I might be able to downgrade? I was expecting the version to be shown as Version 2 anti-rollback.
hyelton said:
Edit: Interesting found Another instance of the non-fusion device and it was a T-Mobile model. But it is unique
Click to expand...
Click to collapse
I have a LG G4 H81022c that shows this Non-Fusing Device for Anti-RollBack
Edit: So I checked my ARB version with SALT, it shows 3. But in the phone it says Non-Fusing Device.

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