One NZ's 10-day option is NZ$100. A Slashtel eSIM with at least 10GB for the same trip is NZ$13.95. Keep your One NZ number for calls and texts.
See UK eSIM plans →One NZ's 10-day Pay monthly daily roaming option costs NZ$100 (NZ$10/day x 10 days). A Slashtel data eSIM for the UK with at least 10GB for 30 days costs $7.89, about NZ$13.95, so NZ$86.05 less. The eSIM is data only: keep your New Zealand SIM in the phone for calls and texts. One NZ prices checked on canstar.co.nz on 28 September 2026.
| One NZ | Includes | Slashtel eSIM (same days or more) | Difference |
|---|---|---|---|
| NZ$30 · 3 daysNZ$10/day x 3 days | NZ$10/day x 3 days | 3GB, 15 days: $3.09 (≈NZ$5.46) | NZ$24.54 less |
| NZ$50 · 5 daysNZ$10/day x 5 days | NZ$10/day x 5 days | 5GB, 30 days: $4.69 (≈NZ$8.29) | NZ$41.71 less |
| NZ$70 · 7 daysNZ$10/day x 7 days | NZ$10/day x 7 days | 10GB, 30 days: $7.89 (≈NZ$13.95) | NZ$56.05 less |
| NZ$100 · 10 daysNZ$10/day x 10 days | NZ$10/day x 10 days | 10GB, 30 days: $7.89 (≈NZ$13.95) | NZ$86.05 less |
| NZ$22 · 7 days | 1GB, 100 min, 100 SMS | 1GB, 7 days: $1.49 (≈NZ$2.63) | NZ$19.37 less |
One NZ prices from canstar.co.nz, checked 28 September 2026; One NZ's options include calls as well as data. Where One NZ charges by the day, we compare an eSIM with at least 1GB a day. Slashtel prices are live, in US dollars, converted at 1.77 per $1 (daily reference rate); your card is charged in your own currency at checkout. One NZ is a trademark of One New Zealand Group. Slashtel is not affiliated with One NZ.
For data, the eSIM. One NZ's 10-day option is NZ$100; a Slashtel eSIM with 10GB for 30 days is $7.89 (about NZ$13.95). One NZ's option also includes calls, which the eSIM does not.
Yes. The eSIM is added alongside your One NZ SIM, so your number stays in the phone for calls and texts such as bank codes. Set the eSIM as the line for mobile data and turn data roaming off on the One NZ line. Whether One NZ charges for anything you receive abroad depends on your plan, so check with One NZ before you travel.
No. It is data only, with no phone number. You can call on WhatsApp, FaceTime or similar apps over the eSIM data.
Most iPhones from the XS onwards, Google Pixel 3 and later, and recent Samsung Galaxy S, Z and A models, provided the phone is not carrier-locked. Check under Settings for an option to add an eSIM.
Install it at home before you fly, while you have Wi-Fi, and switch mobile data to it when you land.