If you are not a turist and like roaming a lot, a minute (or a next day) when you arrive in Ireland, you would like to buy a SIM card. As a VIP user in Croatia, for me it was logical to buy Vodafone (found some action for 35€ per month). But anyway, I decided to contact some of Croatians living for few years in Ireland (Facebook group admins and members) to seek their suggestion.
It's nice to think how smart you are, but smart people ask for advice. So they suggested 2 other popular communication providers: Three.ie and Meteor.ie. Meteor looked nice because of Unicorn logo, but offer from Three was better. For 20€ (discount from 30€) you can have "Free All You Can Eat Data" (unlimited data), unlimited Any Network texts (SMS), unlimited Any Network weekend calls (not very good, but it is as it goes), free Three to Three calls and free 4G Access (most of the providers charge you for 4G access. In general, it is bit less good than what I've used in Croatia, but minimum salary 3 times bigger in Ireland, prices are at least twice cheaper than in "Out beautiful".
So, when you chose provider, find closest shop. Mine is some 50 m from B&B I'm staying in, so first thing in the morning is to buy a SIM card.
If you move from Croatia, be sure to unlock (decode) your smartphone first. Otherwise, you won't be able to use your new SIM card. It is now free of charge if you are mobile subscriber in Croatia (or if you have a bill that you bought your mobile in official store). Count on a fact that it takes up to 15 days to unlock it. You can always unlock/decode your smartphone at service but it will cost you around 20 €. You can do it in the shop or online, and be sure to follow instructions when you put your Irish SIM card. Have in mind that every service provider has some phones already unlocked, so check it first.
