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Home / Firmware / SM-G991B / UPO

Firmware G991BXXSJHZA6

Device Galaxy S21 5G

Model SM-G991B

Region UPO

OS Android 15

Release Date 1/21/2026

Upload Date 1/29/2026

PDA G991BXXSJHZA6

CSC G991BOWOJHZA6

Changelist 30959686

Size 9083626672 bytes (approx. 8.5 GB)

Samsung Galaxy S21 5G (SM-G991B) Android 15 Firmware (G991BXXSJHZA6) – UPO | SamFrew