talk on someone's portable phone 意味

• 携帯電話｛けいたい でんわ｝で話す
  

• talk to someone by phone:    （人）と電話｛でんわ｝で話す
• talk to someone on the phone:    （人）と電話｛でんわ｝で話す
• talk with someone on the phone:    （人）と電話で話す