Hey guys. Experimental support for Mi Band 4 firmware update on iOS is ready. At the moment there is only 1.0.5.40 firm - new versions will come soon. You can try Mi Heart Rate app. In case of any problems let me know at support@mimhr.com
You can also try to change languages without updating firmware - some already work fine (depending on the firmware version).
You can also try to change languages without updating firmware - some already work fine (depending on the firmware version).