r/GalaxyS21 • u/Ark_rivia • 25d ago

question Firmware Flash

Hi. Anyone knows how to to flash Samsung phones? I need to flash my S21, SM-G991U to SM-G991U1 XAA unlocked firmware. Currently it's on Android 12 and One UI 4.1

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u/vishnur32 25d ago

Other peoples already explained everything, only one thing to add here, use patched odin and follow this guide