Sorry to hear. Mine would sometimes failed on first connection, but then would be succesful on second power up, without going into pairing mode.
I dismantled it and found the bluetooth chip is CSR 8610 version A04G, K406BK.
Downloaded CSR datasheet says it is MONO, not stereo. No wonder when I was playing a LEFT CHANNEL PINK NOISE, both was playing. Can you verify if your's have aptx and in stereo?
May be mine is a fake. Then my findings previously are all wrong.
Originally Posted by dionysos77
I have tried it many times many to many configurations.
My guess is; headset changes passkey for each bt connection so they don't reconnect without repair.
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