https://news.xiaomi-miui.gr/%ce%bd%ce%ad%ce%bf-mi-fit-4-0-2-mi-band-2-3-3-nfc-%ce%bc%ce%b5-%ce%b5%ce%bb%ce%bb%ce%b7%ce%bd%ce%b9%ce%ba%cf%8c-firmware-v2-4-0-12_v49-v1-8-0-17-v49/