Connecting Motorola Bluetooth Headset to PS3: Not Directly Supported; Use USB Bluetooth Adapter or Wired Headset
PS3 Bluetooth 2.0 stack does not pair with modern Motorola headsets (BT 3.0+/4.0/5.0). Sony restricted BT to official devices (Sixaxis, DS3, BD Remote, official headsets).
Workarounds
USB Bluetooth Adapter (Best Shot):
Plug into PS3 USB port.
Must support HSP/HFP (Headset/Handsfree profiles).