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 How to remove LG G3 lag and improve performance

How to remove LG G3 lag and improve performance

The LG G3 is a great phone with an awesome 5.5 qHD display. It’s been my go-to Android device ever since and it even replaced my Nexus 7 at home. However, many people complain about lag, performance issues and a rather sluggish user interface. But why does that happen? It looks like LG decided to implement a thermal throttling which slows down your CPU to 1.5 Ghz once it hits 60°. Luckily theres a fix for that 🙂 While I personally would recommend flashing a custom ROM and using the throttling fix, you can also just go with the fix. This article will show you how to fix lag and improve performance of your LG G3.

As with all in-depth Android tweaks, you need a rooted device with a custom recovery. Luckily, root tools for most LG G3 versions are available since months. Check out our LG G3 rooting guide before we get started. As said before, there are different ways and steps of fixing the lag:

  1. Install a custom ROM & thermal fix
  2. Remove bloatware & install thermal fix
  3. Only install thermal fix

I would personally recommend to go all-in with a custom ROM and the thermal fix, the other ways will also improve your user experience.

Table of Contents

1. CloudyG3 & Thermal Fix

CloudyG3 is currently the best and most popular LG G3 ROM. It uses the official LG G3 operating system but has tons of tweaks and performance improvements. Features include, amongst others,

  • SuperSU root access
  • Busybox + runparts
  • Debloated
  • AdAway integrated
  • Calling recorder
  • ViPER4Android

I’ve tested multiple ROMs for the LG G3 and this is definitely my favourite one. While I usual prefer to full stock Android experience, I cannot recommend any AOSP-based ROMs at the moment. Why? Because the camera is horrible. Let’s hope there’s a fix for that soon. Installing the ROM is pretty straight-forward once you got root access and TWRP installed.

  1. Boot into recovery (Turn off phone, hold power and Volume down until LG logo appears, release keys, hold keys again until asked to reset device; If TWRP is installed properly it will load afterwards)
  2. Full wipe (Dalvik, Cache, System & Data)
  3. Flash CloudyG3
  4. Install using Aroma installer
  5. Reboot

That’s it. Pretty easy eh? After the device has booted you can go back to step two and install the thermal fix.

2. Install LG G3 Throttling Fix

If you skipped step 1 and are still on a rooted LG stock ROM, I can only recommend to remove bloatware first in order to improve your device performance. Of course, we’ve got you covered with a guide.

Afterwards you can go ahead and install the throttling fix. While there are different versions available, I would recommend to use the 75° version.

  1. Download thermal fix here
  2. Navigate to system/etc and look for thermal-engine-8974.config, thermal-engine, thermald.conf and thermald-8974.config. Make a backup of those files
  3. Reboot to recovery
  4. Install thermal fix
  5. Wipe Dalvik Cache
  6. Reboot

That’s it. You should immediately see a performance improvement. Have fun & leave questions and feedback in the comment section below.

Philipp Greitsch

Philipp Greitsch

Philipp Greitsch is a mobile enthusiast with great interest in the latest trends and developments in mobile, technology and things that make our everyday life awesome.
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5 thoughts on “How to remove LG G3 lag and improve performance


Will this delete everything on my phone


Depending on what you do, yes. However, you can always make a backup using titanium backup. See here for more information:

Andrew Hopesays:

I am calling you wrong on this. Try the Blisspop Rom(A spin of Cyanogenmod 12)As near perfect version of Android as Ive used on any handset. actually improves on Cyanogenmod ‘s great work, is lightning fast & there’s not even a hint of OEM crap ruining all that material greatness. My solution for the camera, there is a dev who has not only ported the G3 camera app to Aosp roms, but also the HTC One M9s which are both great depending on your needs. Personally I run Camera FV5 because I love having full manual controls.

Rameez Jr.says:

I am on cloudy G3 2.5 but rom is a lil laggy at messaging app and smart bulletin. is there any other rom which is actually a genuine Lg UI rom like cloudy?


okay trying the throttle fix now


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