RoamTheWorldCellPhones.com

Cellphone GSM Frequencies: 900/1800

(This means you will need a GSM cellphone that will work on 900MHz or 1800Mhz to use it in Ireland.)

Cellular carriers for Ireland

Meteor Mobile Telecommunications Limited

Frequency: GSM 900/1800
Website: www.meteor.ie

Coverage Map

O2 Communications (Ireland) Ltd.

Frequency: GSM 900/1800
Website: www.o2online.ie

Coverage Map

Vodafone Ireland Ltd.

Frequency: GSM 900/1800
Website: www.vodafone.ie

Coverage Map

If you've used either of these networks or roamed in Ireland, please post about your experience and the cost. Feel free to ask questions.