1 Jun 2015

Install android lollipop based Cyanogenmod 12.1 custom rom on Lg G3 D855

After the success of lg g2 they have finally released another flagship which brings 2k display to smart phones.Lg g3 is one of the first smart phone to sport a quad hd display and is powered by a quad core snapdragon 801 processor clocked at 2.5ghz and is backed with 3 or 2 gb of ram depending on inter storage.It runs on android 4.4 kitkat and has been updated to lollipop.Primary camera on this device is a 13mp sensor while secondary camera is 2.1mp.

Though lg has updated it lollipop its not the latest version of android that you get right now.If you want to enjoy android 5.1.1 on your g3 you have to go for custom roms for sure.But the problem is, it is new to android development ecosystem and there are very less roms that are available for this device.There are only few roms which have official support and Lg g3 D855 is officially supported by cyanogenmod so you can have latest version of android at your door step.

This custom rom which we are going to flash on lg g3 is specific to device with model number D855 so if you don't have it just be away from this as flashing this on other model number might be a disaster for you.TO check your device model number go to settings and then to about device.You will find your device model number and confirm it as D855.

As flashing custom roms is a risky process we take no responsibility if you brick your g3.So proceed at your own risk.

Why to go for a custom rom on lg G3?

  • Less bloatware: Usually stock rom are loaded with lot of bloatware and unwanted stuff.This might hinder performance a bit which might result in laggyness.Custom roms will have less bloatware or no bloatware at all as a result of which you will notice its performance is much better than on stock rom.
  • Better performance: Though performance can be increased by controlling cpu and Gpu  with root apps you might not achieve what you want.There is better scope for performance on custom roms as developers implements different mods to make it perfect.
  • Battery life: Battery life is always opposite to performance.Greater the performance least the battery life  you get.In order to get a balance one between them you have to go for custom roms. 
  • Better customization; Most of the apps with root access will work better on custom roms than on stock roms.For instance take xposed installer.It offers lot of modules for customization but will work perfectly on custom roms than on stock one.
  • Check you Lg G3 model number by going into about device and confirm that you are using D855 only as flashing on carrier variants might brick it.
  • Make sure that lg mobile utility drivers are already installed on your computer.If you don't have then do install them.
  • You must have updated it to official kitkat or lollipop that is already available if you are starting from scratch.
  • Root: You need to have root access on your Lg G3 D855 to install cyanogenmod 12.1 custom rom .
  • Backup:Backup all your data which includes contacts,apps,photos videos etc everything to computer or any cloud networks as Flashing cyanogenmod 12.1 on Lg G3 D855 might erase all the data on your device.
  • Backup Efs partitions: This is for those who already have twrp installed.Backup all your efs partition of your Lg G3 D855 on existing rom.Just in case if you loose signal or imei  you can just restore it back.
  • Battery: Charge your D855 85% so that you wont encounter any battery related problems while updating it.
  • You must have a unlocked bootloader on Lg G3 D855to flash this rom.
  • Downloads:Lollipop based cyanogenmod for lg g3 D855  on your computer or device.
  • Recovery: You need a custom recovery installed on your lg g3 d855 without it you will not able to flash roms at all.

Install cyanogenmod custom rom cm 12.1 On LG g3 D855:

Cyanogenmod custom rom cm 12.1 for Lg G3 D855
Cyanogenmod rom :
Cyanogenmod is one of the best custom roms available in android development ecosystem.They support lot of devices.This rom is based on android open source project with lot of added features.IT uses android 5.1.1 lollipop as base for now and will be updated to later versions of android when available.
  • Theme engine: Theme engine is from the cyanogenmod custom rom which basically changes the look user interface from lock screen  to ring tones all the way up to boot animations.The speciality of the theme engine is the ability to choose individual elements of every theme you have installed.So you like the ring tons and wallpapers of one theme and icons of other theme then you can have them at a time.Just open the theme chooser and you will understand how to do it.
  • Performance control:A default cpu manager app to control frequencies and governors.You can adjust cpu frequencies and also set them on boot too.
  • Trebuchet: This is the default launcher that ships with cyanogenmod rom.But if you flash gapps then you might loose this.It doesn't have too many features like nova or other launchers but its simple and fast.
  • Software Updates: Cyanogenmod rom is usually available in three types one s nightlies which gets updated with new features every night and are quite stable for daily usage.second one is the snapchat which is monthly build version which will be stable version and other one is the release candidate.Some times nightlies are considered must stable than the snapshots. As of now we have android lollipop 5.1.1  in form on CM 12.1. 
  • Status bar Tweaks:Status bar has lot of tweaks which include a brightness slider.Slide in status bar to adjust brightness of the screen.Double tap on status bar to sleep device and also network speed indicator for on going traffic info.

Flash cm 12.1 rom on lg g3 using Twrp recovery:

  • Download cyanogenmod 12.1 for lg g3 D855 and Gapps transfer them to sdcard or internal storage of device.
  • Power of the device completely and wait for few seconds to confirm that it is completely off.
  • Using button combinations reboot into recovery or use quick boot app to enter recovery
  • Once you are in recovery backup existing rom first. It might about 5 minutes for backup to complete and do not interrupt backup process.
  • Click on back and choose advance wipe option.
  • Select data,system,cache,dalvik cache and swipe to confirm wipe.
  • Once you have wiped required partitions go back and click on install.
  • Navigate to location where you have placed your g3 d855 rom and select it.
  • Swipe to confirm flash and wait for 5 minutes for process to complete.
  • Again click on install and select gapps this time,swipe to confirm to flash.
  • Once gapps are flashed reboot to system.Wait at least 15 minutes for initial boot to complete and once done you can explore its features.
  • If your G3 D855 fails to boot remove battery and put it back. Reboot it to recovery and this wipe system  and flash the rom again.

Flashing Cm 12.1 on lg g3 using cwm :

  • Download Cyanogenmod 12.1 custom rom for lg g3 D855 and transfer it to internal storage.
  • Press and hold power button and when you get boot options click on boot into recovery if you have it or just click on power off.
  • Using button combinations just reboot into cwm recovery.
  • Click on backup and create a nandroid backup of existing rom if you dont have one.
  • Once backup process is completed wipe cache,dalvik cache ,data and system.
  • Now click on install and select the cm 12.1 zip file which you have downloaded and flash it.
  • Once flashing is done just reboot it.

Final words on cm 12.1 custom rom for lg g3:

By following above procedure you will be able to Install android lollipop based Cyanogenmod 12.1 custom rom on Lg G3 D855.AS this is meant for this model only dont try this rom other variants.If you have any complaints regarding this guide let us know in comment section and also if you have any other queries comment here or you can contact us any any time.
Install android lollipop based Cyanogenmod 12.1 custom rom on Lg G3 D855 Reviewed by Radha Krishna on 13:20 Rating: 5 After the success of lg g2 they have finally released another flagship which brings 2k display to smart phones.Lg g3 is one of the first sm...

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