Can I suggest you also check out worldlink.ie as a pre carrier select .
You would need to have to return to Eircom for your line rental.
Also once back with Eircom, just use the following for all your calls ; Call13434 .
Cost is 5 cent connection fee for all calls and if you ring a landline in Ireland, Uk or US, you dont pay a cent more irrespective of how long you chat to your family or friends.
Calls to Irish mobiles are only 10 cents /min at all times! Calls to UK mobiles are only 9 cents/min!!!
I use them and am saving a packet in comparison to most of the deals out there. Having worldlink as the PCS means that if I inadverantly forget to ring 13434, I still pay pretty good prices and don't get stung by Eircom's very expensive prices.
Good luck