How to downgrade the firmware of your LG Optimus One

If you are one of those fellas who upgraded the firmware of your LG Optimus One and want do downgrade for whatever reason, here are the steps you need to follow.
Steps

  • Find out the code for your phone from this link.
  • The site contains list of all firmwares available for LG Optimus One P500.
  • Then frame the following URL as shown below,

http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/XXXXX/V10a_00/V10A_00.kdz

where XXXX is code obtained from step 1.

For example:

If I am downloading the original firmware for Optimus One in India, I will open the link from the First step. I will find out the code for Indian Optimus One which will be either AINDHW or AIRQBK

Then I frame the URL like the one below

http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AIRQBK/V10a_00/V10A_00.kdz

http://csmg.lgmobile.com:9002/swdata/WEBSW/LGP500/AIRQBK/V10b_00/V10B_00.kdz

  • You can download the latest firmware by changing the alphabets V10a to V10b and so on (Highlighted above). Download and store it on your PC.
  • Once the download is complete, download the KDZ updater from the link here.

  • Install msxml.msi
  • Connect your phone in the non USB mode and start KDZ_FW_UPD.exe
  • Select

Type : 3GQCT

PhoneMode : DIAG

KDZ file : The ROM you downloaded form the step above

  • Press Launch Software update. The process will take roughly 10 mins. The phone screen will show Emergency Mode. The phone reboots after the ROM update.
  • Done.

 

9 Responses to How to downgrade the firmware of your LG Optimus One

  1. Seth Solpico says:

    Upgrading my Optimus One using the regular method failed. So I used this method and it actually works. Thank you so much.

  2. Seth Solpico says:

    Thank you for this.

  3. Seth Solpico says:

    Upgrading my Optimus One using the regular method failed. So I used this method and it actually works. Thank you so much.

  4. Seth Solpico says:

    Thank you for this.

  5. Seth Solpico says:

    Upgrading my Optimus One using the regular method failed. So I used this method and it actually works. Thank you so much.

  6. Seth Solpico says:

    Thank you for this.

  7. Avinash S G says:

    Its my pleasure and I feel good that my article helped you.

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