I have multiple phones experienceing the same issue using FW 7.4.6. The audio on the bluetooth seems to stop working as soon as someone uses the speakerphone while the Bluetooth is paired. If a user attempts to make a call with the bluetooth after making a call using speakerphone there is no audio. The phone almost doesn't recognize the BT anymore because pushing the pickup button on the headset won't make the phone pickup or hangup a call. The simplest way to make it work (were talking about stanard non-techinical end users) is to power cycle the phone. This happens with multiple brands of bluetooth headsets and with multiple phones.
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