Use phone when abroad — ring to break strike? (4)
I believe the answer is:
roam
'use phone when abroad' is the definition.
(to use a different phone network when abroad)
'ring to break strike?' is the wordplay.
'ring' becomes 'O' (letter resembling a ring).
'to break' indicates putting letters inside (inserted letters break the word apart).
'strike?' becomes 'ram' (I've seen this before).
'o' going inside 'ram' is 'ROAM'.
(Other definitions for roam that I've seen before include "Rove or ramble" , "Ramble without purpose" , "Wander widely" , "range" , "Travel widely" .)