Just data. 5gb should be sufficient
BTW, what type of phone do you have?
eSIMs can seem a little fiddly first time around depending on which provider you use. The better providers have great apps that make it pretty seamless, some you scan a QR code and occasionally I’ve resorted to manually entering the info.
Regardless of which provider you end up using for Oz, what you can do is get one of the freebie (usually low data ones) for NZ and try that at home and get a feel for how the dual sim works on your phone.
On an iPhone, the dual sim settings are usually hidden if you are on a physical SIM.
Once you install your first eSIM, you see there’s now duplicate phone settings for each phone line grouped by each line.
The most important one being “Data Roaming” On/Off for each line.
At the top “Mobile” settings menu, you’ll see which line is the default line for Data and which is the default line for “Voice” (and text).
When you’re heading OS, make sure Data roaming is turned OFF on you regular phone line. That will stop it activating roaming charges when you land! You should still be able to receive SMS for free. Just don’t send an SMS, make or receive a call and your home line shouldn’t charge you - even though you can have your main line turned on OS.
Depending on the eSIM you chose, it’s usually best to install the eSIM over stable wifi before you fly. Check what needs to be done to “activate” the plan you have - sometimes that’s via an app (so you’ll need wifi) but often it just turning the line ON and then turn on Data Roaming and switch the default Data line eSIM. That’s often enough to get it going and you’ll have data when you land.
GigSky is a reputable provider albeit a bit expensive compared to others but they do have a free trial plan (including NZ) if you wanted to play around with eSIMs at home.
