Not to worry...
"Radiofrequency exposure from cell phone use does cause heating to the area of the body where a cell phone or other device is held (e.g., the ear and head). However,
it is not sufficient to measurably increase body temperature. There are no other clearly established effects on the human body from radiofrequency radiation."
https://www.cancer.gov/about-cancer/causes-prevention/risk/radiation/cell-phones-fact-sheet