Currently Mi Band 8 (China Version) only work with Mi Fitness app. You can't transfer old data from Zepp Life to Mi Fitness if you are not in china region because of

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Third party data on mi fitness : r/miband

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Does anyone know if this is correct? I can't use my Mi band 7 (Cn version) on Mi fitness app only on Zepp Life app, 'cause It says the region isn't supported. (It's in Brazil's region) : r/miband