I don't know what drivers are use for the H500 Bluetooth headset. My PPC600ROM version is: 1.36.00 WWE
ROM Date: 01/13/05
Radio Ver: HA00_140
Protocol Ver: AA3.3.301
PRL Ver: 10029
ExRom Ver: 1.36.113 WWE

After using it for a week it works fine, no problems when turning the Bluetooth on and off and it recognizes the headset right away.

Hope this helps.

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Art P.
"LiveSTRONG"