LG G3 is quite an old device now which was launched back in 2014. The phone was a flagship back then when it was launched.
The device had top-notch specs, and a premium feel at that time. Of course, the device as of now will be of no use to many people, but having a custom ROM installed on the phone can let you use your device even in 2022.
Custom ROMs are designed to enhance the overall experience and the performance of your phone.
Installing a custom ROM will allow you to use an older device like LG G3 for basic purposes like listening to music, display for CCTV camera, or making notes.
If you are also having an old LG G3 which is of no use to you, then you can prefer installing a custom ROM on it. This article is a compilation of some of the best custom ROMs for LG G3 in 2022.
Also Read: Best Custom ROMs for LG G6 in 2022
Table of Contents
Best Custom ROMs For LG G3 in 2021

Lineage OS

The very first custom ROM we have on the list is Lineage OS. Lineage OS is one of the best custom ROMs that you can get for your LG G3 in 2021. Lineage OS will bring a smoother performance to a device like LG G3. The ROM is the successor of the Cyanogen MOD, so it brings in various features of the Cyanogen MOD.
Also Read: Best Custom ROMs for LG G4 in 2021
The ROM is not only smooth, but one can experience fewer bugs on this ROM. The main focus of the developer is to have a theme with minimal bugs, and that’s what Lineage OS is there for.
ROM OS: Android 9 (Pie)
Download Link: Lineage OS
ROM Maintainer: HardStyl3r
Official Thread: Link
AOSP Extended

AOSP extended is one of the most popular custom ROM for Android devices. The ROM is based on Android Open Source Projects, so it integrates features of stock Android to your device. The ROM has a stock Android experience, so if you are looking for stock Android UI on your LG G3 then this is one of the best ROM that you can go for.
Not only does it have features of stock Android, but a lot more. With stable performance and a bug-free interface, this is the ROM that you should go for.
ROM OS: Android 10
Download Link: AOSP Extended
ROM Maintainer: HardStyl3r
Official Thread: Link
Euphoria OS

The next ROM that we have on the list is Euphoria OS, which is known for the customizations it offers to Android phones. If you want a highly customizable ROM on your device, BlissPop is what you should go for.
The ROM is based on AOSP, so you expect many features to be similar to the stock Android. Moreover, the UI of the ROM is clean, and the ROM is optimized to increase the performance of your phone.
It brings in various features to your phone including, customizations, gestures, and various others. Moreover, you can expect frequent update cycles with this custom ROM.
ROM OS: Android 5.1 (Lollipop)
Download Link: Euphoria OS
ROM Maintainer: 777jon
Official Thread: Link
Fulmics ROM
Fulmics ROM is one of the most optimized ROM for LG G3. If you are having an LG G3, then you should give it a try to Fulmics ROM. The custom ROM comes with various tweaks and customizations. The ROM is highly customizable, so if you play around with tweaks and settings of your phone, then Fulmics ROM is for you.
Moreover, the ROM isn’t quite bulky and provides a smoother and cleaner experience to the users. There is no bloatware, and fewer bugs in the ROM, so you can expect optimal performance from the ROM.
ROM OS: 6.0 (Marshmallow)
Download Link: Fulmics ROM
ROM Maintainer: xprit
Official Thread: Link
AOSP CAF

The last ROM we have on the list is AOSP CAF, which is based on Android Open Source Project. You can expect everything from UI to features to be similar to Stock Android. You get a stock Android experience with this ROM. If you are not of custom UI and want stock Android UI on your device, then you should go for AOSP CAF.
There is no added bloatware. The ROM has fewer bugs. Moreover, you get smoother performance and a cleaner UI experience with this ROM.
ROM OS: 6.0 (Marshmallow)
Download Link: AOSP CAF
ROM Maintainer: mistercheese
Official Thread: Link
Final Words
These were all the best custom ROMS for LG G3 that we recommend going for in 2021. If you are looking for custom ROMs to provide optimal performance, then you can prefer going for these ROMs.