Three

Ireland ★★★ Verified Customer: 1913

Three Ireland (Hutchison 3G subsidiary) overtook Vodafone in 2021 to become Ireland's market leader (39% vs 36%). Former O2 customers were transferred to Three in 2015 (some O2 legacy tariffs still retained). Offers 2G/3G/4G/5G services, 4G LTE on 1800MHz (B3) + 800MHz (B20) + 2100MHz (B1) in some rural areas; 5G launched 2020 on 1800MHz (n3 DSS) and 3500MHz (n78), mostly in urban areas. Three shares some network with Eir. Boost It is a data/minutes/SMS combo add-on. USSD largely unavailable on Three (2G phasing out caused this); all functions via Three App or SMS shortcode 50050. Country code +353.