A — 2: Who made the first mobile call and why?
B — 4: Which mobile phone has no other advantages but glamour?
C — 3: Are the rules of using phones in school always followed by students?
D — 7: How can a mobile phone message save your life?
E — 5: Why can a mobile phone be dangerous for children?
F — 1: Young people of which country are the fastest at texting?