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    Samsung Galaxy S21 (SM-G991U1) - ATT - G991U1UESJHZB1 firmware

    Country
    Model SM-G991U1
    Product Code ATT
    Security Patch 2026-01-01
    OS Version Android 15
    PDA G991U1UESJHZB1
    CSC G991U1OYMJHZB1
    Build Date 2026-02-24
    Changelist 30959686
    Join to Download Fast download
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    Flash instructions

    Download Odin 5 files help 1 file help