14 Aug 2015

Install lollipop based cyanogenmod 12.1 custom rom on Lg optimus l9 P765

Optimus l9 is one of the best midrange device ever released by Lg.This Ti omap processor smartphone was actually very good when it comes to performance while delivering a decent battery life.As Android was evolving rapidly lg failed to provide latest updates and was stuck at 4.1.1 jellybean.

If you are still stuck on android jellybean or just rooted your lg optimus L9 and took the advantage of root apps to optimze user interface but not satisfied at all its time for you to shift to a custom rom on your P765.

This was a highly successful lg device and has been released with many model numbers depending on regions.There are 4 models available namely P760, P765, P768, P769.If you have a P765 then you can flash this cyanogenmod 12.1 on your device and this roms is not meant for other models of optimus L9.

Flashing this on other variants of L9 might result in lot of app crashes and unstable os or even cause brick which you may not like at all.So if you don't have P765 then be away from this.Since updating your smartphone using custom firmware is a risky one we take no responsibility if you brick the device.

This rom is also flashable on P768 but you will be camera might not work.If you don't use camera much then you can flash it but still we are not at all responsible if any thing happens to your device.

Cyanogenmod 12.1 custom rom on Lg optimus L9 P765:

cyanogenmod 12.1 custom rom on Lg optimus l9 P765 P768
cyanogenmod 12.1 custom rom on Lg optimus l9 P765
About 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. Being an unofficial rom and also compiled using jelly bean sources its quite common to have bugs for sure and you might even encounter force closed if you flash in compatible gapps.But if you want to taste lollipop on your optimus L9 then you have to flash this for sure.
cyanogenmod for Lg optimus l9
cyanogenmod lg optimus l9

General Features:
  • 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.
    theme engine lg l9 roms xda
  • 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.
    traffic indicator lg l9 custom roms xda
  • 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 is 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. 
  • If you root apps dont work then that is no response form super user it means it has been disabled and you can enable it in developer options easily.
These are the best features of cyanogenmod 12.1 custom rom for lg optimus L9 and you can explore rest of them by flashing this on your device.
  • Check you optimus L9 model number first and confirm that you are using P765.This is essential as flashing rom on other variants like on Korean or carrier variant might cause issues or even brick it.
  • You must have updated it to latest official software version that is available if you are starting from scratch.
  • Make sure that lg mobile utility drivers are already installed on your computer.If you don't have them do install then as transferring rom to device might need drivers.You can download even on mobile if you don't want to use computer.
  • Root: You need to have root access on your optimus L9 P765.
  • Backup:Backup all your data which includes contacts,apps,photos videos etc everything to computer or any cloud networks as flashing  unofficial cm 12.1 custom rom on L9 might erase all the data on your device.
  • Backup Efs partitions: This is for those who already have twrp recovery installed.Backup all your efs partition of your Lg optimus L9 on current Rom or firmware.Just in case if you loose signal or imei  you can just restore it back.
  • Battery: Charge your Lg P765 to 90% so that you wont encounter any battery related problems while flashing this rom.
  • Custom recovery: You need a custom recovery installed on L9 p765.Without it you can not flash roms at all.
  • You must have a unlocked bootloader.Of course you can't flash rom on locked bootloader.
  • DownloadsCm 12.1 for lg optimus L9 (Mega mirrorand google apps and transfer them to internal storage.

Flash cm 12.1 on P765 using cwm/philz recovery:

  • Download cm 12.1 for optimus L9 (cm-12.1-20150701-UNOFFICIAL-p765.zip)and move 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.
  • Once you have turned off your optimus L9 then press and hold volume up and down buttons while powering it on.You will enter fastboot mode.
  • Now reboot it to recovery and make a backup first if you don't have it.
  • Once done click on wipe data and do a factory reset.
  • Now click on install and select the zip file which you have downloaded and flash it.
  • Once flashing is done just reboot it.If you don't have cwm or philz then flash it with twrp recovery.

Flash Cm 12.1 rom using TWRP Recovery: 

  • Download cyanogenmod for P765 (cm-12.1-20150701-UNOFFICIAL-p765.zip) and Gapps transfer them to sd card 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 TWRP 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 system,data,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 Optimus L9 p765 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 optimus L9 p765 fails to boot remove battery and put it back. Reboot it to recovery and this wipe system  and flash the rom again.
If you  have any other queries regarding installing cyanogenmod 12.1 custom rom on your lg optimus l9 P765 don't forget to leave a comment below.
Install lollipop based cyanogenmod 12.1 custom rom on Lg optimus l9 P765 Reviewed by Radha Krishna on 18:52 Rating: 5 Optimus l9 is one of the best midrange device ever released by Lg.This Ti omap processor smartphone was actually very good when it comes to...

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