Increasing ownership of mobile phones by children increases pressure on schools to create mobile phone policies. This study investigated parents' and children's co-constructed views of mobile phone use at school. Nine parents and child (aged 10 to 11 years) dyads were interviewed. The data were analysed using Reflexive Thematic Analysis. Generally, parents and children held shared views of the importance of having phones to keep in contact alongside an awareness of the risks. Hearing the children's and parents' co-constructed views and solutions highlight the potential positive impact of their involvement in co-developing school mobile phone policies.