Written By Harold Hisona on Friday, February 22, 2013 | 4:36 PM
LG Optimus LTE SU640 variants finally get their share of the most prevalent Android 4.2.2 Jelly Bean CMO10.1 build released recently by the Android devs community, with more customization than the AOSP release. Having this said, owners of LG Optimus model LTE SU640 may now install the CM10.1 custom firmware on their smartphones.
Provided below is a step-by-step guide on how to install Android 4.2.2 Jelly Bean CM10.1 ROM custom firmware on LG Optimus model LTE SU640. You may follow this process if you’re decided to go for the recent update on your phone now.
To get started, double check your phone settings to confirm you have the correct model for this update. Note that this guide is only applicable for LG Optimus LTE SU640 and therefore, should not be used in any other Android device to avoid any issue. To check your phone model, go to Settings and then About Phone.
After verifying the model of your phone, back up all important data stored in it, so you can easily recover them later if necessary. Also make sure to spare at least 80 percent battery power on your device, to avoid any possible interruptions during the installation. You may see a hard brick if your device shuts off in the middle of the process.
A USB Driver for LG Optimus LTE SU640 should also be installed in your PC. Also, be sure to enable USB Debugging for file transfer between PC and mobile to be done smoothly. And finally, make sure your device is rooted with ClockworkMod Recovery Installed.
We will not be held liable for any damage that may occur due to the instructions provided in this page, as we understood you try this at your own risk. Nevertheless, it is very unlikely that your smartphone will get damage if you follow all the given instructions correctly.
1. Download zip files for CM10.1 ROM 4.2.2 Jelly Bean ROM for LG Optimus LTE SU640 (Filename: cm-10.1-20130219-NIGHTLY-su640.zip) and Google Apps (Filename: gapps-jb-20121212-signed.zip).
2. Connect smartphone to your PC with a USB cable.
3. Copy your downloaded files to the phone’s SD card. DO NOT extract the files.
4. Disconnect the USB cable and turn your smartphone off.
5. Boot into the Recovery Mode by pressing and holding the Volume Down and Power button simultaneously. Use the Volume buttons for scrolling up and down, and the Power button to select an option.
6. Create a Nandroid backup of your existing ROM for you to restore later, if in case the new ROM won’t work properly. To do so, select Backup and Restore option. This will prompt you with another screen. Select Backup again and return to the main recovery menu once backup is done.
7. Wipe data by selecting Wipe Data/Factory Reset options from the menu. From the next screen, select Yes to confirm data wiping task. It will take a few minutes for the data wipe to complete, so wait until it’s all done.
8. Once data wipe is finished, return to the CWM recovery main menu and select Wipe Cache Partition. Under the advance option, select Wipe Dalvik Cache to do Dalvik cache wiping.
9. From the SDCard, select Install Zip and then select Choose Zip from SDCard.
10. Locate the cm-10.1-20130219-NIGHTLY-su640.zip file and press the power button to select it.
11. On the next screen, select Yes-Install —–.zip option to confirm installation. This will instigate ROM installation.
12. Wait until ROM installation is completed and repeat step 9, but this time, you have to select the gapps-jb-20121212-signed.zip file instead of ROM zip for you to install the Google apps package.
13. Wait until installation of Google apps is finished and then return to the Main Recovery Menu.
14. Select Reboot System Now option to reboot your smartphone. This will boot up into the customized Android 4.2.2 Jelly Bean ROM CM10.1. Since this is the first boot, expect that it will take time to complete. Just wait until it’s done.
Congratulations! You now have installed the latest Android 4.2.2 Jelly Bean firmware based on custom ROM CM10.1 on your LG Optimus LTE SU640 smartphone.
If you want to go back to the Previous ROM, then you have to boot into recovery and select BackUp and Restore option. Select your previous ROM from the given list to have it restored.