Home / Firmware / SM-G991B / SIO
Galaxy S21 5G
G991BXXU3BUKG
SIOAndroid 12Released 11/23/2021Firmware details
Key identifiers and package metadata for this release.
G991BXXU3BUKGG991BOXM3BUKG SEADSEADCSC code SIO21 carriers in 8 countries
CSC stands for Consumer Software Customization (sometimes "Country Sales Code"). Samsung firmware ships with carrier- and region-specific configs; the networks listed below are what this CSC was built to support out of the box.
A1 SI29340NWIDNW00048A1 SI29340NWIDNW00585Mobitel29341NWIDNW00759T-229364NWIDNW01200Telemach29370NWIDNW01253
ONE27601NWIDNW01256Vodafone27602NWIDNW01477
BH Mobile21890NWIDNW00209HT-ERONET21803NWIDNW00572m:tel21805NWIDNW00704
A1 HR21910NWIDNW01798HT HR21901NWIDNW00593Telemach21902NWIDNW01245
m:tel29703NWIDNW00695One29701NWIDNW01255telekom.me29702NWIDNW01251
A1 MK29403NWIDNW01957Telekom.mk29401NWIDNW02035
A1 SRB22005NWIDNW02073mt:s22003NWIDNW00802Yettel22001NWIDNW01259
Movistar21407NWIDNW01200