[Sprint LG G3] 1619415:
So first of all I have no idea if anyone has ever made a post on how to root the G3 (LS990) so I decided to go ahead and make one (to be helpful). This post was made on 3/4/15 check the date and make sure that this isn't to outdated

[COLOR="Red"]IF YOU DO THIS, YOU ARE AT THE RISK OF BRICKING YOUR PHONE/ BREAKING IT I AM NOT RESPONSIBLE IF ANYTHING HAPPENS TO YOUR DEVICE(S) READ CAREFULLY!!!!!!!!![/COLOR]

1) Make sure that you are on ZV4 you can check this by going into settings>About phone>Software Info>Software version. If it is not on ZV4 then you should refer to the help post below on help down grading.

2) If you are in fact on ZV4 then you need to enable "Unknown sources". This will allow you to download/install the application needed to root our device. Go into Settings>Security>Unknown sources make sure to check this and agree (press "ok") to the pop up.

3) Once you have enabled that go to this xda link and install this app on your phone: http://xdaforums.com/lg-g3/orig-development/root-stump-root-lg-g3-sprint-verizon-t2850906. Download the latest copy and pull down your status bar and tap on the notification. You will be brought to a install menu now press "install" a security pop up will show up. Just say ok to it and allow the app to keep installing once it has installed press the "open" button.

4) Once inside the app press "Grind" a pop up will come up telling about brute force. Just say ok the reason for this is that our model (LS990) isn't officially supported but brute forcing will work so just let it run. Then turn up your volume and listen to the music (:good:). Once it is done it will tell you to reboot, go ahead and reboot. Once you have gotten back into your system download this app from the playstore: https://play.google.com/store/apps/details?id=eu.chainfire.supersu&hl=en this app will give you root access/ mange it. Once it is open you might be prompted to update the binary go ahead and update it. You will have two options "normal" or twrp/cwm" press "normal" and then reboot once it is completed:

[IMG="SuperSu update"]http://xdaforums.com/attachment.php?attachmentid=3177376&d=1424554886[/IMG].

5) Go to this thread and download the latest bumped twrp: http://xdaforums.com/sprint-lg-g3/orig-development/recovery-twrp-touch-recovery-2-8-2-0-t2966096 make sure to download the .img file this is needed so that you can flash recovery. The is two ways of doing this 1) running commands from your computer or 2) using a app from the playstore called flashify: https://play.google.com/store/apps/details?id=com.cgollner.flashify&hl=en to make things simple we will use flashify.

6) Make sure the .img is in your download(s) folder and open flashify agree to the disclaimer and then grant it root access. Then click "Recovery Image". Then click "Choose a file" and navigate to your .img and select it. It will come up with a pop up just press "Yup" and it will flash. Now you can go ahead and be done just press the option to reboot to recovery. Or below I will link some videos with a how to boot into recovery so you can watch that to find the hardware key method. Or you can use this app it will reboot you really easily: https://play.google.com/store/apps/details?id=com.siriusapplications.quickboot&hl=en.

(Thanks goes to the creators of all of the work I have listed above! Make sure to thank them (thumbs up:good:) and maybe buy pro's/donate.)

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Lollipop ZV8 ROOT (MAYBE)

Here is the link for the new ZV8 lollipop root: http://xdaforums.com/android/development/guide-root-method-lg-devices-t3049772 I have no idea if it works so just read carefully. If someone can PM me and tell me if it works that would be great. Also since the thread has instructions I will likely not make a guide.