Downgrading from Marshmallow to Lolipop

[Ryoside]

Right now I have the LG G4 (H812) from Fido. Absolutely love the phone, but was extremely disappointed in finding out there was no root method that worked with Marshmallow.

CyanogenMod has been my go to since 2013. Needless to say, I'm on a mission to have it running on my G4. It looks like the only way to do so is downgrading to Lollipop.

Any advice?

 

[raptorddd]

Right now I have the LG G4 (H812) from Fido. Absolutely love the phone, but was extremely disappointed in finding out there was no root method that worked with Marshmallow.

CyanogenMod has been my go to since 2013. Needless to say, I'm on a mission to have it running on my G4. It looks like the only way to do so is downgrading to Lollipop.

Any advice?

i dont think your variant can be bootloader unock to install twrp.... you need that to flash cm.
you can get root on LP. and yes you can downgrade .. as long as both version antirollback are the same.. dont downgrade if they are different it will brick phone... example am on 20i MM is antirollback V2 and l0n LP is V2 also i cana change from both .. but new is 20o antirollback V3 if i update am stuck there... this is on the tmobile not sure of other variants... youll need to ask..
and in LP you can ad root only..

 

[Ryoside]

I can't flash TWRP with Flashify once root is achieved?

 

[raptorddd]

I can't flash TWRP with Flashify once root is achieved?

no.. you must have bootloader unlock .. only tmobile h811 and some h815 europeans variatns not all h815 can be bootloader unlock... but you can root LP only..

 

[niftium]

I can't flash TWRP with Flashify once root is achieved?

IIRC, H812's all have locked bootloaders, so no TWRP.

ETA: Ninja'd.

 

[Ryoside]

In dev options it allows me to check OEM unlock. Are you sure?

 

[niftium]

In my dev options it allows me to check OEM unlock. Are you sure?

It's a bogus switch. Nothing happens.

 

[raptorddd]

In my dev options it allows me to check OEM unlock. Are you sure?

http://forum.xda-developers.com/g4/general/unlock-list-lg-g4-variants-unlocked-t3262621

 

[Ryoside]

Okay. CyanogenMod is a no go. What about achieving root?

 

[raptorddd]

Okay. CyanogenMod is a no go. What about achieving root?

like i said as long you can downgrade to LP assuming your antirrollback its the same as the LP then follow this guide any question just ask.

http://forum.xda-developers.com/g4/general/lg-g4-100-root-success-directives-root-t3180586

 

[Ryoside]

How would I find out if it's compatible?

 

[raptorddd]

How would I find out if it's compatible?

If you search for hidden menu code you enter it on dialer. then in there should be device info on the bottom it should tell you your antirollback.. then make sure or ask in the KDZ thread wich is compatible... am not sure if this is only for t mobile or the rest of phones.. look for your variant LP KDZ and ask there..

 

[Ryoside]

My antirollback is 0.

 

[raptorddd]

My rollback is 0

then you can downgrade to LP... use the thread in GENERAL section go back to stock, or use the NEW LGUP method thread.. follow intructions and download your variant KDZ.

 

[Ryoside]

Alright. Here is all my device information...

Android 6.0

Factory:
LG G4 H812 AT 01 v20e 302 720

Original:
LG G4 H812 AT 00 v20e RGS CA

Antirollback 0

Any idea where to find the image I need?

 

[raptorddd]

Alright. Here is all my device information...

Android 6.0

Factory:
LG G4 H812 AT 01 v20e 302 720

Original:
LG G4 H812 AT 00 v20e RGS CA

Antirollback 0

Any idea where to find the image I need?

heres guide i prefer the LGUP.. ihave no idea ask in there wich one and provide the information above so someopne can tell you wich image you need tell them you want LP..

http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848


http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803

 

[Ryoside]

Will do. Any legitimacy behind this "one click root" for MM that's all over other forums?

 

[raptorddd]

Will do. Any legitimacy behind this "one click root" for MM that's all over other forums?

i dont know... ive used one click root on G2 5.02. it worked on LP... oon G4 root can only be achieve on LP injecting rooted system.img .. as in MM they use systemless.. so in order to root it until now you need a kernel that supports systemless.. and of course twrp. and for that you need bootloader unlocked.. ill do a search but beleive if there was root for MM it will be posted in XDA..

 

[Ryoside]

I'm assuming there's no way to unlock my bootloader as well.

I haven't found anything solid.

 

[raptorddd]

I'm assuming there's no way to unlock my bootloader as well.

I haven't found anything solid.

if its not on the list that i gave you then am afraid not... until someone finds a way or if LG decides.. some people still have hopes.. that eventually someone will find a way to get root and twrp... maybe someday.. :fingers-crossed: