How reliable is the eSIMAdventures signal on New Zealand's Cook Strait ferry journey?

While sailing across the Cook Strait between New Zealand's North and South Islands, you'll generally find robust signal when departing Wellington and approaching Picton. However, as the ferry ventures into the open water and navigates the picturesque but often remote Marlborough Sounds, expect connectivity to become intermittent. For crucial communications, we recommend sending messages while docked or using offline maps and guides prepared before departure. eSIMAdventures focuses on keeping you connected where it matters most, but vast open waters present a universal challenge.