Parents in Wales were also more concerned about who their child is in contact with when they use their phone as well as the potential of them being bullied via their mobile phones.
Roedd rhieni yng Nghymru hefyd yn poeni mwy am bwy mae eu plentyn yn cysylltu â nhw pan fyddan nhw’n defnyddio eu ffôn, a’r posibilrwydd y byddan nhw’n cael eu bwlio ar eu ffôn symudol.