Are you getting a network connection and are calls/texts working ok?
If so then check your APN settings and if the APN field has changed from 48months.liffeytelecom.com then edit it, change it back to that, save the settings, enable and disable airplane mode and see if data starts working.
If it doesn't then check this thread and/it contact 48 support.
https://community.48.ie/t5/Internet/How-to-fix-no-network-service-when-roaming/m-p/56518
Hope this helps.
