This tutorial explains how to flash your LG Optimus 4X HD back to original firmware using the KDZ firmware updater from this site. With this tutorial you will be able to upgrade your LG Optimus 4X HD from any country. LG Cell Phone Software
If you got only bootloop after flash .kdz, just do a hard reset: press and hold [vol -] and [power] until you got the “android recovery figure” and wait until they reboot again.
Warning: I will not be responsible for any damage of your device. Do it at your own risk! Has everything involving flashing, it always has its risks!
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this was the easiest guide ever.
great job! 🙂
whats 3 files, i only see one kdz-update
edgar, these files are compressed into a ZIP file… download the zip and unzip it. you will get them, enjoy.
Hi, it needs to be root to flash the phone?
Yeah i have the same question….Do i need to be rooted to do this?
Una pregunta tengo cyanogenmod.. puedo instalar esta rom sin problemas?
I had to make a factory reset after installing.
I don’t really know how to get there but I think you have to keep the [vol -] and [power] after plugging in the battery.
for a first time didn’t work but i make the same step again and it works and i had to make factory reset…. thanks it help me very much
thanks it helped me to finish my work, i have spent about 8 9 hours before i got this post, after this page it took only few mints to complete my work thanks a lot…
Links do not work, i cant download those 3 apps you said in step one. Please put new links and check them.