domestic retail price — a roaming provider’s domestic retail per-unit charge applicable to calls made and SMS messages sent (both originating and terminating on different public communications networks within the same Member State), and to data consumed by a customer; in the event that there is no specific domestic retail per-unit charge, the domestic retail price shall be deemed to be the same charging mechanism as that applied to the customer for calls made and SMS messages sent (both originating and terminating on different public communications networks within the same Member State), and data consumed in that customer’s Member State (b)

internet access service — a publicly available electronic communications service that provides access to the internet, and thereby connectivity to virtually all end points of the internet, irrespective of the network technology and terminal equipment used (2)

provider of electronic communications to the public — an undertaking providing public communications networks or publicly available electronic communications services (1)

separate sale of regulated retail data roaming services — the provision of regulated data roaming services provided to roaming customers directly on a visited network by an alternative roaming provider (b)