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Home / Firmware / SM-G998U / ATT

Firmware G998USQSJHZB1

Device Galaxy S21 Ultra 5G

Model SM-G998U

Region ATT

OS Android 15

Release Date 2/24/2026

Upload Date 3/18/2026

PDA G998USQSJHZB1

CSC G998UOYNJHZB1

Changelist 30959686

Size 8711256208 bytes (approx. 8.1 GB)

Samsung Galaxy S21 Ultra 5G (SM-G998U) Android 15 Firmware (G998USQSJHZB1) – ATT | SamFrew