YOU SAID:

I phoned the phone guy and he called my mom

INTO JAPANESE

私は電話の男に電話をかけ、彼は私の母に電話をかけました

BACK INTO ENGLISH

I called the man on the phone and he called my mom

INTO JAPANESE

私はその男に電話をかけ、彼は私の母に電話をかけた

BACK INTO ENGLISH

I called the man and he called my mother

INTO JAPANESE

私はその男に電話し、彼は私の母に電話した

BACK INTO ENGLISH

I called the man and he called my mother