[G3 General] topet2k12001:
Hi @RealRedHair,

LG G3 only so far (reported cases), and you can see/read these reported cases submitted in this thread.

Allow me to explain (in as layman as possible) some concepts because I want to align your expectations versus what the various tools offer.

The other one-click/automated root scripts and Imageprep are the same in the following sense:

1. They are all based off the original/manual method (Imageprep and the other one-click rooting scripts are merely attempts to automate the process and make it simpler for end-users)

2. They are virtually the same, for the rooting part of the process. The other tools are focused mainly on being "one-click" solutions (which is not a bad thing). My focus when I created Imageprep is not to make a one-click solution (because they already exist prior) but on other processes that I wanted to personally automate, initially for personal use (installation of custom recovery and "bootloader unlock"). Eventually, I decided to share Imageprep to the community as it may benefit other users.

"Custom Recovery"

1. A "custom recovery" is different per device and even model/variants within a device - for example, the LG G3 has different models/variants. There's an AT&T variant (D850), T-Mobile variant (D851), Canadian Variants (D852 and D852G), a dual-SIM variant (D858 and D858HK), and so on.

2. Having said that, each variant within a model (as described above) may differ in the "make-up" of the Recovery partition (the recovery.img - this, when modified/developed, is the "custom recovery" that we know). Hence, people who develop/create a custom recovery will make one specific to each.

3. Imageprep will allow you to install a custom recovery that is made/developed/created specifically for your brand/model/variant of LG phone, provided you already have a copy on-hand (Imageprep will ask you to locate/find that copy from your computer - for details, please download the video tutorial/demo from the first page/first post of this thread).

4. There are two popular makers of custom recovery: TWRP (TeamWin Recovery Project) and CWM (ClockworkMod). Imageprep is designed to assist users in installing TWRP only and there are no reports of success, yet alone reported attempts, to try installing CWM using Imageprep.

5. Feel free to visit the website of TWRP so you will be able to understand this better. You will notice that there is a TWRP made for various devices (and further, model variants within device models and brands).

"Bootloader Unlock"

1. The "bootloader" (in layman's terms - technical experts please excuse my usage of terms, this is for the benefit of those who are not into the technical details) relates to the "boot" partition (the boot.img).

2. Unlike "Google devices" (a.k.a. Nexus phones/tablets), unlocking the bootloader of other Android phones is a bit restrictive. There are great developers who found a way around this restriction. In the case of LG G2 and G3, the process developed is called "bump" (best layman term I can think of is "patching" of the bootloader).

3. This process of "patching" or "unlocking of the bootloader" may vary across different LG device models. What works for the LG G3 may be different with other LG phones. That is why I cannot make a guarantee for it. There is already a process specific to the LG L90 which is what I would tend to lean on with more confidence if I was in your shoes, since your source of confidence is/are reports of people who (1) actually own the same phone as you and (2) have personally tested and reported success.

Imageprep allows you to choose whether you want to ONLY root your device, or ONLY install custom recovery, or ONLY "bump" ("unlock"/"patch") your bootloader. Or any combination, or all three - if this helps. So at least as far as rooting ONLY (since Imageprep as well as the other one-click scripts are based off the same original process) I'd say you should be fine.

As far as "bootloader unlock" and "custom recovery installation", these are the processes that I would caution you on if you plan to do them using Imageprep.

There's a video demo/tutorial at the first page/first post of this thread, if it helps. I encourage you to download and watch it. I intentionally uploaded that video so that people can visualize what it does before they actually try it.