Was it working before?
I'm in Dublin and it's all working fine.
Does rebooting and/or manually scanning for and connecting to the 48 network (or O2 if 48 is not listed) help?
Any chance you breached the fair usage limits and got barred for the remainder of your current monthly membership? Although in that case I don't think that you lose the signal itself - just access to calls/text/data services...
When you log into your online account does it say that your membership is valid?
Are there any other messages displayed there?
Hope this helps.
