Mi Account
you are currently using a GLOBAL/EEA DEV, GLOBAL/EEA DEV, CHINA DEV, CHINA STABLE ROM (basically all official Xiaomi ROMs are supported
you can normally boot your device (doesnt work if it doesnt boot)
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at least 50% battery
you use a Xiaomi Smartphone, except Android ONE devices (Mi A1, A2, …)
Note: You do this at your own risk!