You may need to reset Priva if it is not working as expected. When Priva is reset to factory default settings, all the paired mobile phone information will be erased.
Step 1. Turn off the lasted paired headphones to disconnect.
Step 2. Press and hold the big button for 7s until the LED flashes BLUE and RED alternately, then let go. Now Priva is in pairing mode
Step 3. Double click the big button quickly, the BLUE and RED LED will be both on for 1s.
Step 4. Unplug 3.5mm audio cable to complete the reset procedure
For more details, please see Avantree Priva video user guide-