roaming

US /ˈroʊ.mɪŋ/
UK /ˈroʊ.mɪŋ/
1.

đi lang thang

moving about aimlessly or unsystematically, especially over a wide area.

:
roaming herds of reindeer
1.

đi lang thang

the practice of using a mobile phone on another operator's network, typically while abroad.

:
EU officials have been cutting the fees companies can charge for roaming