Are calls and texts working?
If so then check your internet settings and if the APN field of the APN settings has changed from 48months.liffeytelecom.com to something else then edit it, change it back to 48months.liffeytelecom.com, reboot and try again.
If that doesn't work then you'll have to contact 48 support.
See the link in my signature below.
Unfortunately some people roaming in the EU on a Guido membership don't get internet working (and some can't get ANYTHING working) even though it should just work and 48 don't seem to be able to fix this generally.
Hope this helps.
