The phone volume doesn't change when I adjust it from the main units (Xperia Ear Duo)
You might experience that you can't adjust the volume from the earpieces.
This problem is phone related. It may occur if you use the Xperia Ear Duo together with, for example, Galaxy S8, Huawei P10 or Xperia M4 Aqua. These phone models have the same issue with other Bluetooth headsets.
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