I got myself a 10U for my C3 Pro (with latests firmware version 1.2) and notice a lot of reconnects between the headset and my mobile phone (HTC One M8) over bluetooth:

- If normally paired, the bluetooth is reconnecting each 40 seconds (visible on the phone that bluetooth connection is lost and that it is reconnecting. Also audible through the headset by a short beep.

- If normally paired but media audio is unmarked, the bluetooth connection is stable

- If paired as Media Selective Pairing (music only), the bluetooth connecting is reconnecting every 5 seconds. Visible on the phone but no audible beep on the headset.

- If paired as Phone Selective Pairing (phone only), the bluetooth connection is stable

However, if the Sena and the phone are paired together (normal or music only) and music is played, there is no bluetooth reconnect.

I have paired with my wifes M8 and experience exactly the same problem. Unfortunately, I don't have any more phones.

Anyone experiencing the same problem or can confirm this behavior with other phones? Except for this (and the terrible FM receiving), I'm happy with the 10U but wondering if I should RMA this one or that it is a firmware bug.