Four schools in one county have each signed a pledge with the aim of becoming smartphone-free.
The headteachers of Kempsey, Welland and Hanley Swan Primaries, along with Hanley Castle High, all in Worcestershire, sent a letter to parents asking them to consider not getting their children a smartphone until they were in at least Year 9.
The head teacher of Kempsey, Bryony Baynes, said she knew of children as young as five who have smartphones.
"We're not saying never have a smartphone," she said. "We're just saying think about when you give it."