What is an eSIM?

2 min read · Updated 11 October 2026

An eSIM is a digital SIM built into your phone. Instead of inserting a plastic card, you scan a QR code or activate it in your provider’s app.

Why use an eSIM?

  • Get connected in minutes, with no waiting for a SIM in the post
  • Use two numbers on one phone, for example work and personal
  • Add a local plan when travelling and keep your NZ number active

Does my phone support eSIM?

Most iPhones from the XS onwards, Google Pixel 3 and newer, and recent Samsung Galaxy flagships support eSIM. Check your settings for “Add eSIM” or “Add mobile plan”.

Which providers offer eSIM?

11 of the 16 providers we compare confirm eSIM support:

Kogan Mobile doesn’t offer eSIM yet, so you’ll need a physical SIM.

We couldn’t confirm eSIM support for Warehouse Mobile, Slingshot, Mercury Mobile and Nova Energy mobile from their websites, so check with them before you buy.

See every plan that supports it on our eSIM plans comparison.

How to set one up

  1. Check your phone is unlocked and supports eSIM.
  2. Sign up with a provider that offers eSIM. You’ll get a QR code, or set it up in the provider’s app.
  3. On iPhone, go to Settings › Mobile Data › Add eSIM. On Android, look in Settings › Network & internet (the wording varies by brand).
  4. Scan the code, label the line (for example “Personal”) and choose which line uses mobile data.

Changing phones

An eSIM is tied to the phone, so you can’t just move a card across. Some phones can transfer an eSIM directly; otherwise ask your provider for a new eSIM for the new phone.

eSIMs for travel

eSIMs are handy overseas: add a local data plan and keep your NZ number on your main SIM. Visiting New Zealand? See the best eSIMs for New Zealand.