Yes. All major Irish mobile operators support number portability. When you switch to a new provider, you can request to keep your existing number. Just make sure your current number is active and registered in your name before making the switch.

Prepaid plans require you to top up in advance and have no contracts. You pay only for what you use.
Postpaid (bill pay) plans typically come with a monthly bill and may include a phone with your contract. They often offer better data limits or 5G access but usually require a 12–24 month commitment.

The easiest way is through your operator’s mobile app or website. You can also top up at retail stores, ATMs, or using voucher codes. Some banks in Ireland also allow top-ups directly through mobile banking apps.

Yes. Providers like Three, Vodafone, and ClearMobile offer unlimited data plans. However, always check the fair usage policy—some “unlimited” plans may throttle speeds after a certain usage limit.

Quick top up Eir allows you to top up without signing into your account. It’s useful for emergencies or for topping up someone else's Eir mobile number. Regular Eir top up online through My Eir gives you more control and history access.