It's a companion Android app you install on your phone after rooting. It's used to verify if root access was successful and manage certain system-level functions.
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This typically means a signature verification mismatch or file corruption occurred during download. Download the specialized firmware file again, clear any processes running in the background, and confirm your bootloader is unlocked. Device Caught in a Boot Loop After Flashing It's a companion Android app you install on
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Re-flashes broken partition tables to revive soft-bricked hardware.