This is my second anker soundbud sport bluetooth that has the same problem: After just a few weeks of using it, the left side has gone significantly lower than the right side.
I have already checked the volume balance configuration, and it is not that.
Has anyone experienced this? I don't think I will be able to return this to the vendor yet again, but if I could I'd surely ask for a refund.
Really disappointed with the quality of these phones.