Bluetooth on XKSSTEL X100 -- fix bug help

[Ferdy]

Hello group,

I have an XKSSTEL X100 Chinese cell phone made by Success Technologies, Inc. LTD.

GREAT phone---it has every feature I want in a phone--but, it has a bug in the Bluetooth function.

I am able to connect and sync any of my Bluetooth headsets (3 Motorolas and 1 Jabra), but the phone will not stay connected to them when receiving or calling. I get a message that the "headset is busy-transferring voice to phone". Occasionaly, but very seldom, will this not happen---so I am pretty positive that the phone has buggy Bluetooth software or firmware.

Can anyone help with a fix? Is there a way to update the software or firmware to rid the Bluetooth problem with this phone? It is not, I am pretty certain, a setting in phone that I am missing. I have tried every conceivable variations of settings, including switching from the handsfree protocol to the headset protocol, setting the device as default, etc, etc. The phone supports Bluetooth 2.0 and A2DP protocols.

Thanks for your help,

Ferdy