What exactly do you mean by "not working"?
No connection to a local network - no signal bars?
A connection but some or all of calls, texts and/or mobile data isn't working?
For roaming issues the usual advice applies:
Unfortunately many people still seem to have problems with roaming abroad on 48 for some reason.
If your SIM predates January 2023 then a replacement may mitigate or eliminate roaming problems:
It may be worthwhile reviewing these two threads in case any of the suggestions help to avoid roaming problems:
If you have returned to Ireland from roaming abroad and are having problems using the 48 network/calls/texts/mobile data then see this key post, in particular the section titled "Returned Home?":
If you still have problems then you'll probably need to contact 48 support for further assistance.
