HAPPY 2026! – SamMobile. Awesome deals Galaxy Z Fold7, Watch8, S25 Ultra and S95F OLED TV
Login or Join

Search

    BEST PICKS BY OUR SAMSUNG EXPERTS
    HOT RIGHT NOW
    galaxy s25 ultra – samsung apps
    Order the King of Android!
    Latest reviews
    samsung galaxy ai
    Feel the power of Galaxy AI in the palm of your hands!
    BEST PICKS BY OUR SAMSUNG EXPERTS
    HOT RIGHT NOW
    TV
    samsung qd-display explained
    Mihai Matei Explaining Samsung's QD-Display technology
    Trending
    samsung-one-ui-8.5
    Everything about the latest version of One UI
    Trending
    Samsung Galaxy AI vs. Apple Intelligence
    20250304_090612
    Your all-in-one post!
    BEST PICKS BY OUR SAMSUNG EXPERTS
    hot right now
    vacuum cleaners
    samsung-digital-appliances-bespoke-ai-jet-ultra-worlds-most-powerful-cordless-stick-vacuum-cleaner_main1
    Bespoke AI Jet Ultra

    Samsung Galaxy S21 (SM-G991B) - O2U - G991BXXU1AUA4 firmware

    Country
    Model SM-G991B
    Product Code O2U
    Security Patch 2021-01-01
    OS Version Android 11
    PDA G991BXXU1AUA4
    CSC G991BOXM1AUA4
    Build Date 2021-01-6
    Changelist 20701476
    Join to Download Fast download
    Advertisement

    Flash instructions

    Download Odin 5 files help 1 file help
    Advertisement