Home / Firmware / SM-G991U1 / XAR
Galaxy S21 5G
G991U1UESJHZB1
XARAndroid 15Released 2/24/2026Firmware details
Key identifiers and package metadata for this release.
G991U1UESJHZB1G991U1OYMJHZB1 USAUSACSC code XAR5 carriers in 2 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.
AT&T310410NWIDNW02171AT&T311180NWIDNW02171AT&T310950NWIDNW02171AT&T310410NWIDNW02172AT&T311180NWIDNW02172AT&T310950NWIDNW02172AT&T310410NWIDNW02088AT&T311180NWIDNW0208800101NWIDNW00156
AT&T310280NWIDNW02171AT&T310280NWIDNW02172