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Highland Council plans to consult parents and school staff on pupils' use of mobile phones in classrooms.
Nairn Academy and Grantown Grammar School have already introduced bans.
Councillors have now unanimously backed a proposal from Labour's Michael Gregson and Conservative's Helen Crawford for a wider consultation.
Mr Gregson and Ms Crawford said phones were having a disruptive effect on children and their education.
The proposal includes a commitment from the local authority to support schools that decide to ban the devices.