Galaxy S21 5G
Firmware G991NKSSCHZA5
South Korea · SKCAndroid 15Built Jan 12, 2026Release information
The software versions and region covered by this firmware update.
G991NKSSCHZA5G991NOKRCHZA5 South KoreaInside the firmware
Read from the build properties and kernel of this firmware.
o1sAP3A.240905.015.A2.G991NKSSCHZA55.4.242-30958140-abG991NKSSCHZA5South Korea · CSC SKC · 3 carriers in 1 country
CSC is Samsung's region and carrier customization. The networks below are included in this release.
LG U+45006NWIDNW00680LG U+45006NWIDNW00681olleh45008NWIDNW00649olleh45008NWIDNW00650SKTelecom45005NWIDNW01125SKTelecom45005NWIDNW01126