I was in Northern Ireland last week and I had no service

[dalyer]

Unfortunately it seems that roaming problems persist for some users. 

When it comes to roaming issues the usual advice applies...

If your SIM predates January 2023 then a replacement may mitigate or eliminate roaming problems: 

• https://48.ie/help/sim-replacement

It may be worthwhile reviewing these two threads in case any of the suggestions help to avoid roaming problems:

• https://community.48.ie/t5/The-Knowledge-Base/The-Roaming-Troubleshooting-Guide/ta-p/52179
• https://community.48.ie/t5/Internet/How-to-fix-no-network-service-when-roaming/m-p/56352

If you still have problems then you'll probably need to contact 48 support for further assistance.

See the links in my signature below.