There are two mechanisms in how wireless radiation can harm
1) The electricity stresses the brain. You can measure this on an EEG.
2) The volt opens the calcium channels and calcium enters the cells in the body. The mechanisms inside of the cell results in oxidative stress. Oxidative stress in huge amounts. You can measure the oxidative stress in the body in various ways.
Mechanisms linked to exposure to Electromagnetic fields (EMFs)
The Lancet December 2018.
Planetary electromagnetic pollution: it is time to assess its impact