He explained that he and Catherine made a joint decision to withhold smartphones due to concerns about internet access, suggesting a basic "brick phone" might be considered for secondary school.
Speaking from Rio de Janeiro during the Earthshot Prize, William also shared insights into their family life, including sharing school runs and attending children's events.
The Prince of Wales discussed how he and Catherine navigate family challenges, including recent health issues, by communicating openly with their children.
William expressed his commitment to leaving a better world for the next generation, particularly focusing on environmental issues, and is set to be made an honorary citizen of Rio de Janeiro.