[AT&T LG G3] rob219:
i take no credit for this as i did not create this recovery. all credit goes to teamwin for their twrp recovery.

neither myself or teamwin are responsible for anything that may happen to your phone by flashing this recovery or what you do with it after it is installed.

I HAVE ONLY DONE THIS USING ANDROID 5.0 AND 5.1. I DO NOT KNOW OR PROMISE IT WILL WORK ON ANY OTHER VERSIONS OF ANDROID (4.4) FOR THE LG G3 D850. YOU ARE DOING THIS WITH KNOWING YOU MAY HARM YOUR DEVICE AND THE CHOICE IS 100% YOURS AND NO ONE CAN OR WILL BE BLAMED FOR KILLING YOUR PHONE BUT YOU.

****EDIT: THERE IS A FASTER WAY I HAVE TRIED AND POSTED BELOW****

****NEW WAY****

first, you must be rooted and have bumpd twrp already installed which should be twrp version 2.8.6.1 from the original android development section here in the at&t lg g3 forum. i say this because you definetly have to be rooted and i already had bumped twrp 2.8.6.1 installed.

1. USING FLASHIFY CHOOSE RECOVERY IMAGE....

2. CHOOSE DOWNLOAD TWRP AND SELECT THE NEWEST VERSION.....

(IT WILL DOWNLOAD THE TWRP RECOVERY FOR THE D850.)

3. AFTER IT DOWNLOADS IT WILL ASK YOU IF YOUR SURE YOU WANT TO FLASH IT AND WILL SHOW THE FILE NAME WHICH WILL HAVE D850 IN IT....

(twrp-2.8.7.0-d850.img)

4. CHOOSE YES AND REBOOT NOW WHEN IT COMPLETES....

(YOU WILL BOOT INTO TWRP AND WILL BE READY TO DO WHAT YOU WILL WITH IT.)

****AS OF NOW I ASSUME ALL NEW VERSIONS CAN BE FLASHED THIS WAY UNLESS NOTED THAT NEWER VERSIONS CAN NOT. I WILL TEST AND POST ALL NEW VERSIONS AND CHANGE THE DIRECTIONS IF I HAVE TO USE A DIFFERENT METHOD. WHEN AN ANDROID M ROM MAKES ITS WAY TO OUR D850 THEN THIS METHOD MAY NOT WORK AND YOU

SHOULD NOT

TRY IT UNTIL IT IS PROVEN TO WORK ON ANDROID M****

****THE METHOD BELOW IS LONGER BUT I WILL LEAVE IT UP FOR ANYONE THAT WANTS TO USE IT INSTEAD OF THE NEW WAY ABOVE****

first, you must be rooted and have bumpd twrp already installed which should be twrp version 2.8.6.1 from the original android development section here in the at&t lg g3 forum

download the 2.8.7.0 .img file from this link https://dl.twrp.me/d850/ this link is to the download section that is only for our d850 phones so you dont download the wrong image.you can also use the twrp manager app to download the .img file but do not use twrp manager to flash the file or you will get a boot secure error whenever you try booting into recovery. it will never boot into recovery and will just hang on a black screen with the notification light flashing red and blue. if you use the twrp manager app to download the recovery make sure your downloading the recovery image for the d850 only!!!!

after you have downloaded the .img file from either the link or with the twrp manager app, open flashify and select recovery image. then browse to the twrp 2.8.7.0 .img file you downloaded and select it. let flashify flash it and select the option to boot into recovery when it is done. you now have the newest twrp recovery on your lg g3 d850!!!!

i have tested the new recovery and everything works. i have done an advanced wipe of dalvik system data and cache. a regular factory data reset. i have created a backup, and have flashed roms a kernel and xposed all without issue.(depending on your rom xposed may or may not work and may cause bootloops with the xposed mods you enable after flashing. make sure your flashing things you know work. this is my set up on the rom im using. everyones phone is different even if its the same model. dont kill your phone and blame me. if you dont know, dont do it!!!!)

i hope this thread helps anyone that wants the new recovery on their d850 g3 and that the instuctions are as clear as possible to insure the fastest and safest way to install the recovery without hurting your phone or getting a secure boot error.

again i take no credit for this recovery and i am not a developer. this is mearly an instruction manual and to let everyone know that the new twrp can be used and works on our g3 variants.