The best eSIM for New Zealand, including when to compare roaming

The roaming maths, properly

This is the section a competitor would leave out, so here it is first.

Under five days, roaming wins on value, especially on Optus, because you get calls and texts on your own number thrown in and five gigabytes a day is more than almost anyone uses.

From about a week, the eSIM wins, and the gap grows every day because our price does not.

Two things to check before you rely on the roaming column.

Telstra’s day pass is postpaid only, and around eighteen named postpaid plans are excluded on top of that. Prepaid customers get a different product: 3 days for $10 with 400MB, 7 days for $15 with 2GB, or 14 days for $25 with 4GB.

Optus Daily Roaming requires an eligible plan. Choice Plus, Plus Family, Plus Promo, Choice Plus Data, Plus Kids, and several business plans. If you are not on one of those, it does not apply to you.

And both auto-charge with no published cap. Optus re-charges another $5 per 5GB automatically; Telstra tops up non-Upfront customers at $10 per 2GB. Neither publishes a maximum. We have written both mechanics up in detail: how Optus Daily Roaming activates and the Telstra Day Pass compared to a travel eSIM.

When roaming is the wrong answer anyway

You are on prepaid. The day pass products for prepaid are far worse value, and Optus’s prepaid roaming is a different, more limited product.

Your plan is not eligible. Telstra’s exclusion list is long and Optus’s eligibility list is specific.

You are going for more than a week. The daily charge never stops; the eSIM price does.

You want to control the spend exactly. Neither carrier publishes a cap on auto-recharges. An eSIM is a fixed amount of money.

You are travelling with someone on a different network, or you want to hotspot a laptop for a fortnight. The per-day maths gets worse fast.

You already use most of your Australian data allowance. Vodafone’s $5 Roaming, for instance, gives you no data of its own; it unlocks the data already on your plan, and speed-capped plans lose their capped data entirely while roaming.

Dated comparison examples

Ten gigabytes over thirty days, in the currency each provider bills.

Compare the current New Zealand plans by data, validity and total price in Australian dollars. If you compare another billing currency, include the exchange rate and any card fee.

SimCorner’s row is not a like-for-like comparison. Their A$58 plan runs 60 days against our 30. If you need two months of validity that is a different product.

Nomad and Saily bill in US dollars and neither offers an Australian dollar option, so add conversion and whatever foreign transaction fee your card charges. Nomad’s US$18 is competitive after that; Saily’s US$23.99 generally is not.

What to compare before choosing

If you are comparing Ubigi for New Zealand, check the exact plan’s high-speed allowance, reduced speed and allowance period. Check its current reload and reinstallation rules too. Compare those terms with the other plan you are considering, rather than treating one policy as a category-wide winner.

Airalo commits in writing to “no limit on tethering or the number of devices you connect”, publishes its throttle threshold, runs a tiered loyalty programme paying 5% up to 10%, pays Australian referrers A$5 in Australian dollars, and has an offline mode in its app.

For Holafly, compare the current total price for your New Zealand dates, then check speed, hotspot and refund conditions. A plan sold by the day should be compared with enough fixed data for the same trip, not with a different-duration headline price.

For Nomad, compare the current New Zealand offer in the currency you will pay. Check the country list, validity, start window and any voice or SMS requirement. Read reward eligibility separately from the upfront price.

Saily contracts through an Australian company, CyberQuay Pty Ltd in Sydney, publishes its throttle in full, and includes security extras free.

For SimCorner, check the current New Zealand offer, whether it is a physical SIM or eSIM, and any delivery or installation requirements. Compare the exact plan and refund terms before paying. Read current independent reviews directly if they matter to your choice.

For our New Zealand plans, check the exact option’s coverage, allowance, validity, speed and hotspot terms before buying. You can also read our public refund policy and company details. If reviews matter to your decision, open the current independent profile and read the recent feedback rather than relying on an old count here.

How much data do you need in New Zealand?

Less than you think, and less than most destinations.

New Zealand is English-speaking, so you are not running camera translation. Distances are long but the driving is straightforward, and accommodation almost universally has wifi.

Most travellers use three to six gigabytes across a week. The heavy items are maps on long drives, and photo uploads. A 10GB plan over 30 days is comfortable for a two week trip.

One New Zealand-specific note: coverage on the West Coast of the South Island, through the Southern Alps, in Fiordland and on some remote Coromandel and East Cape roads is genuinely patchy on every network. That is geography, not a provider failing, and no eSIM changes it. Download your offline maps before you leave a town.

Full sizing guide: how much data you need for New Zealand.

Plan around the driving days

For a New Zealand road trip, save maps and key bookings offline before you set off. Choose data for the days you will be away from dependable Wi-Fi, then check the supported-network coverage for your actual route. A national plan does not promise reception on every road. If ordinary calls are part of the job, compare that separately from the data allowance.

Hotspot

Airalo states there is no limit on tethering or the number of devices.

Holafly caps hotspot at 1GB per day on trip plans regardless of the unlimited headline.

Saily’s terms prohibit tethering “beyond occasional personal use” without defining it, while their country pages advertise unlimited sharing.

Ubigi, Nomad, SimCorner, Simify and ourselves permit it with no published device limit.

Relevant here because New Zealand trips often involve two people in one car sharing a connection for maps.

Will it work on your phone, and can you keep your number?

Check your exact phone model, regional version and carrier-lock status before buying. It needs eSIM support, and using your Australian line alongside the travel eSIM also needs compatible dual-SIM operation. The phone’s age alone does not settle it. Read our guide to checking your phone before you pay.

Use a compatible, unlocked phone that supports both lines at once. Leave your Australian line enabled and check that international roaming is available on your carrier account. Turn data roaming and automatic data switching off for that line, then use the travel eSIM for mobile data. Calls, voicemail and sent texts can still attract charges. Bank texts depend on your bank, carrier and network; delivery is not guaranteed.

So which one

Use your carrier’s day pass if your trip is under about five days, you are on an eligible postpaid plan, and you want calls and texts on your own number without thinking about it. On this destination, that is a genuinely good answer and we would rather tell you than have you find out afterwards.

Buy our eSIM if your trip is a week or longer, you are on prepaid or an ineligible plan, or you want the total spend fixed in advance rather than auto-charging daily with no published cap.

Buy Ubigi if you are a heavy data user and want a real full speed allowance with a 2 Mbps floor.

Buy Airalo if you need tethering permission in writing.

Buy SimCorner if your phone does not support eSIM.

Buy Holafly if you might cancel and want six months to do it, or your trip is one to three days where their A$6 daily unlimited is unbeatable.

Full three-way comparison: New Zealand eSIM vs roaming vs a local SIM.

Before you fly: Everyone entering New Zealand needs a Traveller Declaration, including New Zealand passport holders. Our New Zealand Traveller Declaration guide covers the 24-hour window, NZeTA distinction and biosecurity questions.

If you have decided what you need, our New Zealand eSIM plans list the current sizes and validity periods.

Questions people actually ask

Is roaming or an eSIM better for New Zealand?

Under about five days, roaming, if you are on an eligible postpaid plan. Optus Daily Roaming is $5 per 24 hours for 5GB plus unlimited standard talk and text, and New Zealand is Zone 1 for both Optus and Telstra. Past a week an eSIM is cheaper and the gap widens daily.

What is the cheapest eSIM for New Zealand from Australia?

Ours, at A$23.95 for 10GB over 30 days, of the providers billing in Australian dollars. Ubigi is A$28, Airalo A$35 and Simify A$49. Nomad’s US$18 headline is lower but converts, and your card may add a fee.

Is New Zealand in Telstra’s Zone 1?

Yes. Telstra’s Zone 1 covers seven destinations including New Zealand at $5 a day for 2GB with unlimited standard calls and SMS. The pass is postpaid only, and around eighteen named postpaid plans are excluded.

How much data do I need for two weeks in New Zealand?

Most travellers use three to six gigabytes a week, which is lower than most destinations because everything is in English and accommodation almost always has wifi. A 10GB plan over 30 days is comfortable for a fortnight.

Will I have coverage on the South Island?

In towns and along the main highways, yes on every network. The West Coast, the Southern Alps and Fiordland are genuinely patchy for everyone, which is geography rather than a provider issue. Download offline maps before leaving a town.

Can I keep my Australian number in New Zealand?

Use a compatible, unlocked phone that supports both lines at once. Leave your Australian line enabled and check that international roaming is available on your carrier account. Turn data roaming and automatic data switching off for that line, then use the travel eSIM for mobile data. Calls, voicemail and sent texts can still attract charges. Bank texts depend on your bank, carrier and network; delivery is not guaranteed.

Do I need a New Zealand SIM card instead?

A local plan can also suit someone who needs a local number, voice service or a particular operator. Check its current terms and whether it is available as a physical SIM or eSIM. Keeping your Australian line active depends on dual-SIM support and carrier roaming settings.

Does an eSIM include calls in New Zealand?

Not on most plans, including ours. Travel eSIMs are data only. That is the main advantage of a carrier day pass on this destination: calls and texts on your own number are included in the daily price.

Sources

Our own prices from our live New Zealand product page. Competitor prices from each company’s own Australian store or published rate card, and from published US dollar pricing for Nomad and Saily. Carrier roaming terms from each carrier’s own published material: Telstra’s International Day Pass zones, inclusions and prepaid roaming products; Optus Daily Roaming’s price, allowance, eligible plans and auto-recharge behaviour. Competitor policy quotes from Airalo’s fair use policy, Saily’s Terms of Service, Ubigi’s Terms and Conditions and Holafly’s refund policy. SimCorner’s review count from ProductReview.com.au, stated as observed. All retrieved 17 to 20 August 2026.

Written by Lachlan, who runs The SIM Shop from Brisbane and answers the support email himself.