2012 Toyota Sienna Navigation Manual - Page 329
2012 Toyota Sienna Manual
Page 329 highlights
TELEPHONE AND INFORMATION Everytime you touch or push on the steering wheel during interrupted call, the other party will be switched. If your cellular phone is not approved for HFP Ver. 1.5, this function can not be used. INFORMATION Interrupt call operation may differ depending on your phone company and cellular phone. 142