My survey about radiation.. (I asked people I saw on the streets who were mainly using their phones)

My question;

"Are you aware of the amount of radiation your mobile phone gives out?"

1. The first person I interviewed doesn't care about the radiation but maybe seeing the amount would make her realise how much radiation is actually around her.

2. The second says she is aware of the amount of radiation but needs her phone because she uses for her business but the detector I made would make her realise even more about radiation and therefore she would try and solve this situation by using headphones whilst talking or preferring text rather than calling.

3. The last said she don't believe what to believe about radiation. So my EMF detector would be a proof for her to see the amount of radiation through her own eyes. How harmful it is and maybe she would use her phone lesser.

The reason why I interviewed people is because I began to question my product. So I wanted to see what kind of people would use my product and when? where? How useful would it be? The EMF radiation detector I made would be useful for these people?