LG-MK121S Firmware SKT

Republic of Korea K121S20A_00_0917.kdz

visit https://lg-firmware-rom.com/to Check and download LG firmwares with IMEI

Below you can find the direct download URL for Republic of Korea LG-MK121S Stock KDZ firmware from LG server.

IMEI:354943080xxxxxx

Model: LG-MK121S

Suffix: ASKTOP

Buyer: SKT

Country: Republic of Korea

Carrier: SK TELECOM

Software Version: K121S20A_00

OS Version: OMR1

File Name: K121S20A_00_0917.kdz

Download:http://pkg02.lgu.gdms.lge.com/dn/downloader.dev?fileKey=FWECU4N1A27XAP303C9F7M6/K121S20A_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 K121S20A_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 K121S20A_00_0917.kdz with LGUP, Check this Guide.


A hard reset or master reset can fix almost all software and apps issues on LG-MK121S smartphone. Learn how to perform a reset, please have a look at LG-MK121S owners manual.

Bypass Google FRP on LG-MK121S? flashing the stock kdz firmware for LG-MK121S does not allow you to bypass the Google Account Verification process.

LG-MK121S SIM-unlock? flashing stock firmware with LGUP can not unlock your LG-MK121S phone.

Below you can download some useful tools and Software:

Download: LGUP 1.14 https://drive.google.com/open?id=1SOhoR2hn9PKiIvUUeiDVeX-8PfuMx1qq

LG Bridge windows: LGBridge_Setup.exe
LG Bridge Mac:LGBridge_Mac.dmg

Download the latest LG USB Drivers

/LGMobileDriver_WHQL_Ver_4.2.0.exe [Latest LG USB drivers 4.2] for Windows