Below you can find the direct download URL for Republic of Korea LG-MK121K Stock KDZ firmware from LG server.
Country: Republic of Korea
Software Version: K121K20A_00
OS Version: OMR1
File Name: K121K20A_00_0917.kdz
Can not download the kdz file from above URL with a browser? PLEASE download and install XDM download manager first . Just copy above URL and start a new Download JOB in XDM download manager to save the K121K20A_00_0917.kdz onto your computer.
KK = Android Kitkat LMR1 or L = Android llolip MMR1 or M = Android Marshmallow NMR1 or N = Android Nougat OMR1 or O = Android Oreo
Learn how to flash K121K20A_00_0917.kdz with LGUP, Check this Guide.
A hard reset or master reset can fix almost all software and apps issues on LG-MK121K smartphone. Learn how to perform a reset, please have a look at LG-MK121K owners manual.
Bypass Google FRP on LG-MK121K? flashing the stock kdz firmware for LG-MK121K does not allow you to bypass the Google Account Verification process.
LG-MK121K SIM-unlock? flashing stock firmware with LGUP can not unlock your LG-MK121K phone.
Below you can download some useful tools and Software:
Download: LGUP 1.14 https://drive.google.com/open?id=1SOhoR2hn9PKiIvUUeiDVeX-8PfuMx1qq
/LGMobileDriver_WHQL_Ver_4.2.0.exe [Latest LG USB drivers 4.2] for Windows