’Eua in detail
There is a Westpac bank near the ferry terminal on 'Eua, plus a Western Union and a couple of other money transfer agencies, but opening hours are sporadic. Bring cash and a credit card.
There is mobile coverage in the villages but it's patchy on the hiking trails.
Bone-up on 'Eua info at Nuku'alofa Visitor Information Centre before you go, and have a look at www.eua-island-tonga.com.