After using Minor III  by use wear only one side per time for 2 or 3 days, my phone can't connect to the left side. I decided to unpair then pair again, I can only pair to the phone but can't connect to the in-air and  bluetooth system say "An app is needed to use this device". I also uninstall application then install again but can't fix this problem. How should I do?

Thank you,

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