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

Home / Firmware / SM-G991B / GTO

Firmware G991BXXSJHZA6

Device Galaxy S21 5G

Model SM-G991B

Region GTO

OS Android 15

Release Date 1/21/2026

Upload Date 1/29/2026

PDA G991BXXSJHZA6

CSC G991BOXMJHZA6

Changelist 30959686

Size 9064370544 bytes (approx. 8.4 GB)