regulated data roaming service
as defined in Regulation (EU) No 531/2012 of the European Parliament and of the Council of…, Article 2(2), point (m) (Definitions)
a roaming service enabling the use of packet switched data communications by a roaming customer by means of his mobile device while it is connected to a visited network. A regulated data roaming service does not include the transmission or receipt of regulated roaming calls or SMS messages, but does include the transmission and receipt of MMS messages