How to Update LG Optimus One P500 with ICS 4.0.4 Cyanogen Mod 9 Firmware

LG Optimus One LogoLG Optimus One P500 smartphone users can now rejoice as in the due course of this article we will be checking out on how you can install the latest firmware of latest ICS based Cyanogen mod 4.0.4 firmware in your device. Please be informed that this is the custom ROM firmware and not the Official firmware released by LG Electronics. This all new custom ROM firmware which is developed on the Cyanogen Mod ROM platform ropes in all the goodness of not just visual changes but also comes with many other features like app2SD, added applications and also all the apps are updated till June, 07, 2012.

Please note that you will have to make sure that you follow all the pre requisites mentioned in this article so to facilitate smoother firmware update. To apply this firmware, you need to ensure that your phone is rooted and is installed with the custom recovery image which is the prime pre requisite. Since this firmware is still in the beta stages, there will be some issues, but there will be many more new updates and stability fixes which will fix all the issues.

Disclaimer: We should not be held liable for any damage caused in the process of applying this rooting process in your device. It is very unlikely that your device will be damaged if you follow all the instructions to the point which are mentioned in procedure.

Caution: This update should be strictly applied to the UNLOCKED Optimus One P500 devices and not on to the network locked devices.

What Works:

  • Functional camera (preview, taking photo, recording video, no panorama)
  • Full H/W acceleration with new adreno drivers, 3D modelling (yamato)
  • Tethering & Hotspot (Bluetooth, USB and Wi-Fi tethering)
  • Usb Mass storage, Usb debugging
  • Wi-Fi, Bluetooth, BT headset (music only)
  • Funny SIM (128k USIMs)
  • Calls, SMS, MMS, 3G/2G, Mobile data
  • Data limit, IPv4, IPv6
  • Stereo audio, headset
  • GPS, Sensors, Lights, Touch screen
  • Off-mode charging
  • Browser, GMail, GPlay
  • Youtube LQ/MQ
  • FM Radio: not implemented in CM yet, use Spirit FM

What doesn’t work:

  • Everything works
  • Don’t report CM bugs!


  • Fix wi-fi tethering
  • Fix deep sleep (guilty: bluetooth)
  • Get rid of init logo
  • New boot animation which is only 200KB
  • CM9 Lock screen calendar
  • CM9 New screen on/off animation
  • Allow interfaces to get IPv6 address when tethering is enabled
  • Fix BT tether IP renew issue
  • Recent LCD Patch which saves power

Pre Requisites:

  • All the data in your LG Optimus P500 phone should be backed up manually with below mentioned instructions to ensure that just in case if the data gets corrupted or gets wiped, you can easily restore the same with the help of below steps.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log -Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names

  • You need to have at least have one custom recovery installed in your phone (Amonra or CWM). Hold down VOL DOWN + HOME + POWER keys to enter LG Optimus One P500 recovery mode and clear all the data by clearing and wiping the same.
  • Now in the recovery mode, select the partition SD Card option – swap-size: 64MB, Ext2-size: 300MB, Continue partitioning, SD:ext2 to ext3.
  • Also, enable the USB – MS toggle in your device. V20G firmware should be installed in your device before you proceed to apply this update.
  • Up next charge in your battery should be a minimum of 60% so as to make sure that it doesn’t turn Off in the middle of firmware update. Enable the USB Debugging in your device from the Development tools section in Settings so as to connect your device with the computer.
  • Also, disable all the security suites present in your phone as these tools interrupt the process of update.

Assuming that you are done with all the above mentioned instructions, it’s now time to proceed to the next page where we have summed up a detailed guide on how to apply this update of ICS in your LG Optimus One P500.


  1. update my lg500 in new softwear

  2. Works fine? Could someone tell me about? Have someone noticed that have your phone “bricked” by this ROM?

  3. I installed it, but can not connect to mobile network!

    It`s a big bug

  4. everything seems great except i keep getting this message “unfortunately, browser has stopped.” any tips on how to remedy this? thanks!

  5. there’s no network…the bar is empty..I went to the settings,wireless and network,mobile network,network me error

  6. Hi! found this useful but i need to know whether to root my device first.?thanks for the help!

  7. Do I need to unlock my phone and if yes how would I?

  8. Does my phone need to be unlocked and is yes how would I go about doing that?

  9. That’s really cool.. everything works just fine..
    Again as a sign of relief due to “increased battery life”.. (viz above expectation)

    Thanks a lotttt :)

  10. Will the Android 4.0.4 work on the mobile phone in Australia.
    I have at present Android 3.2.2 V20c Build Number GRI40

  11. giving problem in playing video.,.,.,

  12. hi, it works fain!!! Thx for the ROM.

  13. Is this true as in everything works? The camera and gallery?

  14. Download link is taking to 4shared website but doesn’t helps with the file download please look into it.

  15. Dude…Firmware link seems to be broken….Help!

  16. Lg p500 update

  17. ICS package firmware Link is empty. There is no file in your hephappy folder to download.. Pls check it.. and Re-upload it..

  18. download for rom is broken :(

  19. Will installing this on the koodo optimus one cause a brick? Why does network locked change anything?

  20. Can someone tell me how can i update my lg p500

  21. why I can’t download the custom firmware?

  22. thanks very much its working fine,smooth&fast

    previously i had cm9 in which camera does not work but this is stable version with least or no bugs

  23. how to rocover mode my mobile

  24.  do you have video of this instruction? can i view?

  25. wow

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