regulated roaming sms message
as defined in Regulation (EU) No 531/2012 of the European Parliament and of the Council of…, Article 2(2), point (k) (Definitions)
an SMS message sent by a roaming customer, originating on a visited network and terminating on a public communications network within the Union or received by a roaming customer, originating on a public communications network within the Union and terminating on a visited network