LG G3 put on display
LG G3 put on displayLG Press Kit

Prolific American mobile software maker Cyanogen has released a new CM12.1 series custom ROM to the 2013 Android flagship smartphone LG G3 models.

This new firmware for the LG G3 models is based on the official AOSP (Android Open Source Project) 5.1 Lollipop OS.

CyanogenMod CM12.1 custom ROM is around 270MB in size and brings numerous bug fixes and new applications including refurbished email app powered by Boxer, which brings multiple account support, exchange support and canned responses for quick replies.

Other customizations options include sound alerts (bells or whistles), option to select different LED colour display for email notifications and many more. [Check out the official change-log list, HERE]

Prerequisites (Things to remember before installing the CyanogenMod ROM):

  1. This new CyanogenMod CM12.1 Android 5.1 Lollipop firmware has to be installed on the LG G3 (D850, D851, D852, D855) models only ; if tried on other devices, it might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  2. Make sure the device is rooted before going forward for custom ROM installation
  3. Installation of custom ROM requires clearing of memory in the smartphone, so make sure to back all the data by installing Clockwork Mod (CWM) Recovery/ TWRP in the smartphone.
  4. Users make sure you have installed USB drivers on the PC, or else your smartphone (LG G3) will not be recognised by the computer.
  5. Make sure your device has more than 80% battery, or else there is a chance of smartphone getting temporarily bricked if the installation process is interrupted mid-way.

[Disclaimer: This procedure is very technical and should be performed by a person with sound knowledge of rooting (or manual software installation) Android devices. If the step-by-step installation process is not followed properly, there are chances of the smartphone getting bricked or being permanently irreparable. IBTimes India cannot be held responsible for any damage or claims from readers if the procedure does not yield the required results or if the smartphone is bricked. Hence, users are advised to proceed with caution.]

Downloadable files:

CM12 Custom ROM for LG G3 (D850): HERE

CM12 Custom ROM for LG G3 (D851): HERE

CM12 Custom ROM for LG G3 (D852): HERE

CM12 Custom ROM for LG G3 (D855): HERE

Google Apps: HERE

Tutorial: Step-by-step installation procedure of CyanogenMod [official] Android 5.1 Lollipop CM12.1 custom ROM on LG G3-

Step 1: After downloading the Android 5.1 Lollipop CM12.1 custom ROM and Google Apps files in to your PC; connect LG G3 to PC via USB cord.

[Note: Before plugging the phone to the computer, be sure that you have installed USB driver software, if not, click HERE to download the firmware]

Step 2: Then, place Android 5.1 Lollipop zip file and Google Apps .zip file into the phone's SD card memory. [Note: Users are advised to paste the .zip file in SD card root, not in any other folder.]

[Note: Before installing the custom software, be sure that the device must have been rooted and has installed ClockworkMod Recovery tool.]

Step 3: Now, turn off the device and disconnect from the PC.

Step 4: Then perform the regular Recovery Mode sortie by press holding 'Volume (Down)' and 'Power' buttons.

Step 5: After entering the RECOVERY mode, clear the phone memory, by choosing 'wipe data/factory reset' option.

[Note: use 'Volume' keys to navigate and 'Power' button to select options, while operating under Recovery Mode]

Step 6: Now, clear the cache memory by selecting 'wipe cache partition'

Step 7: Then to go back to ClockworkMod recovery, and select 'advanced' and tap 'wipe dalvik cache' [Note: This step is optional, but many recommend this procedure so that user will not face boot loops or any other errors in the middle of custom ROM installation]

Step 8: Again come back to main recovery screen and then tap 'install zip from SD card'

Step 9: Then tap 'choose zip from sdcard' and go to Android 5.1 ROM .zip file in SD card and enter the installation process. Repeat the same procedure to install Google Apps [Note: use 'Volume' keys to navigate and 'Power' button to select options]

Step 10: Once done with the installation process, navigate to '+++++Go Back+++++' and re-start the device by opting 'reboot system now' seen in the recovery menu.

Now, your device (LG G3) will take a few minutes to complete the booting process.

Users then head to Settings >> select 'About phone' to confirm the installation of CyanogenMod [official] Android v5.1 Lollipop CM12.1 custom ROM.

[Credits: CyanogenMod.org]

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