I use a Mi Band4 bracelet with NFC, in order for NFC to work correctly, you need to use the Mi Fit application, for the earpiece you need the Zepp application, and when you start applications, each one pulls the bracelet towards itself, it lasts for 10 minutes each time, I had to wear headphones and remove Zepp. An interesting bug was also noticed, WiFi stopped working when Bluetooth was on, and everything was solved by turning off Bluetooth. After removing Zepp, everything worked fine again. Most likely the problem is in the programs installed at the same time. . After a year of use, the left earphone stopped charging, you need to spend 5 minutes to find the position in which it will still connect and it will constantly connect and disconnect. Perhaps the reason is that he put the headphones wet with sweat in the case.
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