Will my SouthESIM work on the Cook Strait Ferry between New Zealand's islands?

When you're crossing the Cook Strait with your SouthESIM, you'll find connectivity is a bit of a mixed bag. You'll likely have a solid signal as you depart from Wellington and approach Picton, perfect for last-minute messages or checking the weather. However, once you're out in the open water and navigating the scenic Marlborough Sounds, the signal can become intermittent. We recommend downloading any maps or entertainment beforehand, so you can just relax and enjoy the stunning views without worrying about data drops.