Whose name is the phone in?
If the noncustodial parent tries to keep the child, the custodial parent can get the noncustodial parent charged with kidnapping and contempt of court both can be jail time for the noncustodial.
Yes, they do.
A noncustodial parent can prevent the custodial parent from leaving the state with a baby or child. The court will decide if the custodial parent has just cause to leave the state.
This is hard to answer because there can be many variables involved. The noncustodial parent may contest the move and take the custodial parent to court to show cause. But it may not be possible for the noncustodial parent to actually prevent the move unless the move is out of state.
Depends on why the parent is non-custodial. If he is unfit they can not. The court usually listen to a teen that old but there are no guarantees they will decide on his favor.
Custodial, as he/she has primary control and influence.