These two sound like good defaults for all iPhones.
> Messages: Most message attachment types other than images are blocked. Some features, like link previews, are disabled.
> Apple services: Incoming invitations and service requests, including FaceTime calls, are blocked if the user has not previously sent the initiator a call or request.
> Messages: Most message attachment types other than images are blocked. Some features, like link previews, are disabled.
> Apple services: Incoming invitations and service requests, including FaceTime calls, are blocked if the user has not previously sent the initiator a call or request.