NO, Nauru (3rd smallest country in the world — 21 km², single island in central Pacific, former phosphate island exploited to exhaustion, nicknamed Pleasant Island) is outside the EU — telecom roaming is billed at high rates. The Alosea Nauru eSIM is essential for adventurous travelers (one of the world's least visited countries — fewer than 200 tourists/year, one of the Pacific's best-kept secrets). You connect to Digicel Nauru upon landing at Yaren (INU — Nauru Airlines flights from Brisbane).