Tutorial to Install Stock ROM in LG Optimus 2x P990

Sanjana February 16, 2012 0

We have already discussed the detail procedure on how to root your LG Optimus 2x P990 smartphone. Rooting enables you to install various custom ROMs and other applications that require root access. Many users might have messed up their phone by trying out various custom ROMs available across different forums.

lg optimus 2x

Some forums have come up with the Nandroid back up procedures that are usually skipped by users before firmware update. Thus it becomes tough to bounce back to the original default factory firmware but you need not worry as we have come up with a simple procedure on how LG Optimus 2x P990 smartphone users can revert back to the original stock ROM. You can proceed with this tutorial even if you have rooted your smartphone and thus reclaim back the lost warranty.

We wont be responsible for any harm caused to your device during the updation procedure that is unlikely to happen if you follow the instructions carefully. The updation procedure is not recommended for basic users but is for advanced users and is only applicable to LG Optimus 2x P990 smartphones that are network unlocked. Do not apply it in any other models of LG or in other device as it might not be reversible and may harm the device by blocking it.


You ought to backup all the user data present in your phone since chances of data loss or corruption are there. Having a backup will enable you to replace the lost data if any damage occurs. Follow the link posted below to backup and restore all your data easily.

Pre Upgrade Instructions for Rooting and Firmware Update

Must Have:

Download Official base ROMDownload LG UMTS SetupDownload LG Modem Drivers

Steps to Install Stock ROM in LG Optimus 2x P990:

 Step-1: Select your country then download the official base ROM as it a country specific firmware release. Next download LG UMTS Setup and extract the files to your computer. Now download and install the latest LG Modem Drivers  along with the DLL setup to your computer.

Step-2: Open the LGDP2_31_INCLUDE_LGDP1_Setup folder and run the exe file. Note down the serial number mentioned in the installation folder for later use.

Step-3: Copy all the contents in the “Download” folder to C:\download folder. If it prompts for overwriting option then tap on the “Ok” button to proceed. After copying connect your phone to the computer via USB cable and open the Device Manager of Windows operating system.

Step-4: To open the Device Manager, right click on “My Computer” then select “Manage” option located on the left pane and note down the port number for LG USB Modem. Remove the connected USB cable and open the file called LGDP2_V36_UMTS from C:\DOWNLOAD location path. Choose UMTS option in the division and tap on Ok button.

Step-5: Choose the port and set the range then enter the value noted in the previous step manually . Now select the downloaded DLL and choose the firmware in the download configuration then tap on Ok button.

Step-6: Enter the device into Download mode (Emergency) and connect the phone to computer via USB cable then hit on Start located in the main window. The ROM installation process will begin, the official firmware will get restored and the stock firmware will be loaded in LG Optimus 2x P990.

Thus you can easily update the stock firmware in your LG Optimus 2x P990 smartphone by following the steps mentioned above carefully.

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