Phone as Bluetooth Headset

I need my phone to act like a Bluetooth headset. I am planning to 开发者_开发百科run a J2ME application in Phone to make Phone as Bluetooth Headset.

Any idea how to do this?

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Can't be done in J2ME as the Bluetooth API supports only SPP and L2CAP (and occasionally OBEX). Bluetooth headsets require the Headset profile.