The most common and most likely answer to this crossword clue is the 4 letter word ROAM
I've seen this crossword clue in The Guardian
R
O
A
M
More clues leading to the result ROAM
- Breaking strike, ring to use non-standard phone service
- Wander — somewhere in Italy, you say?
- I will leave New Zealand people, returning to travel
- Stray sheep has eaten nothing
- Go without fixed purpose in pilgrimage site reportedly
- Duck takes sheep outside for wander
- When abroad, use phone with nothing in memory
- I left aborigine heading west to go on walkabout
- Phone from abroad: somewhere in Italy, say
- Memory burdened by amnesia’s beginning to wander
Buddy explains!

The straight part
We know that "Phone from abroad" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case phone from abroad = roam.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ROAM mean?
ROAM verb- To wander or travel freely and with no specific destination.
- To use a network or service from different locations or devices.
- To transmit (resources) between different locations or devices, to allow comparable usage from any of them.
- To range or wander over.