Parent bought adult who was a minor at the time a phone. The parent returned the phone to the child who was approaching adulthood. The then child is now an adult living at home with autism rent free. Thr parent is the adults carer. The parent describes the phone as the adults phone, but will describe it as their own if they want to take it back at any time to look through. The parent has not given permission for the adult to set a password. The parent has their own phone and does not use the adults phone for any other purpose. The phone is linked to the childs google accounts under their own name, and has a sim card that the adult has payed for. The adult pays for the data, calls and texts.
Is it legal for the parent to do this?