roaming
From Longman Dictionary of Contemporary Englishroamingroam‧ing /ˈrəʊmɪŋ $ ˈroʊ-/ noun [uncountable] the process that a mobile phone uses when it is in a different country or area from usual, and has to connect to a different networkExamples from the Corpusroaming• The company has demonstrated mobile voice and data services capable of roaming and hands-off operation.• After 18 years of roaming, Shirley finally settled down in Missouri.