Qtek 2020 rom upgrade and bluetooth

[ethouin]

Originally, my qtek 2020 had the WM2003 and I was using a SBS BF400 bluetooth hand-free headset and everything was ok.
This headset uses the 1.2 bluetooth protocol.
When I made the upgrade to WM2005, when using the headset, this was constantly connected (and not in standby) draining down the battery in less than 2 hours.
I downgraded the ROM to WM2003 SE (WindowsMobile2003SE_XDA2_2.06 from buzzdev) and this headset works perfectly.
I am wondering if this ca be a problem of bluetooth protocol: which bluetooth version WM2005 uses? Could it be V2.0 o V2.1? Theorically, it should be compatible with V1.2....
Coulf you enligthened me???

Thanks

[Rudegar]

software cant change bluetooth versions to support bluetooth 2 the hardware needs to support it

[ethouin]

So you are telling me that this should not be a protocol problem as it is working with WM2003 and WM2003SE.
Could it be with the bluetooth stack (widcomm or microsoft)?

[Rudegar]

could be a thing about the implemetation of the stack yes