Setting up Apple SE for calls in New Zealand

Assuming it is recent SE with Dual SIM/eSIM facility. All you need to do is buy a local NZ SIM card there, or buy an international travel eSiM here suitable for NZ.

No need to change any account information. But don't try installing apps, or updating or resetting the phone over there.

As8924 wrote:

SE second generation 2020 A2296. Not dual sim

You will have to swap in a local SIM in NZ. No drastic changes needed, just don't lose your proper SIM!

After installing the new sim however...

Change of number

do all 8 steps here, don't miss any out

1.    Settings, Apps, Messages,

2.    turn off iMessage   

3.    Settings, Apps, Facetime,

4.    Turn off Facetime,   

5.    Power down the phone

6.    Turn on the phone again 

7.    Settings, Apps, Messages, turn on iMessage, (wait a moment til it activates)

8.    Settings, Apps, Facetime, turn on Facetime

At the end ensure that your new number and email appear in your send/receive addresses in those settings

What model of SE? (there are 3 different versions)

Tap Settings > General > About

What is the Model Name displayed?

Now tap directly on Model Number and a 5 character number will appear. What is that number?

Which SE model specifically?