Download this Umidigi Bison Pro factory (stock) firmware to flash and restore your phone to its default factory state. After flashing, the firmware will remove root, clean virus, un-brick, and fix all software related faults. You should consider making a complete backup of your phone data, because flashing may erase entirely everything on the phone. We also advice that you should only flash your device if you actually know what you’re doing; to avoid messing up your device, or turning it into a brick. It’s also important that your device is charged up to at least 30% so the process
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