Category "north-island"

How reliable is Vodafone mobile data in NZ?

I'm planning on getting a SIM card for my smartphone while visiting NZ for a Contiki trip, with internet access being my only concern. Wikivoyage mentions that

Black Labyrinth or Tube it in Waitomo? [closed]

I have a few hours in Waitomo and I want to do a glowworm-tubing tour. I have seen two offers that seem to be good (unfortunately I won't have