Hi..I Have A School Assignment And I Wanted To Know

Hi..I have a school assignment and I wanted to know the cell phone radiation harms.
By doing all the research I found out that cell phone radiation mostly causes breast cancer because it affects the heart so I wanted to know:
1)the average heart rate of a normal human
2)the heart rate of a person who keeps their cell phone near their chest pocket as thats the main place from where the heart/heart rate can be affected