Answer:
One big thing is the iphone, it came out in 2005 and it was revolutionary as we all see today. Almost all of us have one but it is a tool. you cant say it is helpful nor harmfull becase like msot things it is about how you use it. althouhg we do not know how it will effect us long term with the low levels radiation.
thats 1 do the res yourself good luck
