While Sophie Sullivan, a youth worker, admits to being addicted to her own phone, she’s banned her children from having them until they have finished their GCSEs. And she is in good company. Prince William has revealed Prince George, 12 , doesn’t have a smartphone and may only have a “brick” phone when he starts secondary school. However, 97% of children in the UK do have smartphones by his age, according to Ofcom ; nearly one in five three to five-year-olds use one and the average age of