So I just brought the ep t31 a couple of days ago and this morning the right earbud was the only one working. When I decide to charge them the right earbud stop working and the left earbud be the only one working for the past few days.
This has happened to me as well, but I am at a loss as to how to fix it. Strangely, there does not appear to be a T-31 manual online, either.
Wait! OK. So I was able to get them back to both connected by removing them from the holder, then pressing the buttons until they both went into a red-white flash mode on the LED. Then, I touched the buttons together which synced them and they now both connect.