Best Mobile Plans in New Zealand Compared: The Provider That Keeps Winning

I looked at what the major mobile providers charge for SIM-only plans across three usage levels — light (under 5GB), medium (10-20GB), and heavy/unlimited — using current pricing as at mid-2026. Skinny wins at every level. The gap is not small.

Skinny runs on the Spark network. Coverage is identical to Spark. The difference is customer service — Skinny's is mostly online, with limited phone support — and the lack of handset bundling. If you already own a phone and just want a SIM, Skinny is the default recommendation.

Light Users (Under 5GB)

Skinny Starter: NZ$12 per month, 5GB data, unlimited NZ calls and texts. One NZ Essential: NZ$25 per month, 10GB data. 2degrees Basic: NZ$19 per month, 5GB data. Spark Basic: NZ$29 per month, 10GB data. The Skinny plan wins on price by a wide margin. If 5GB is not enough, Skinny Popular at NZ$16 per month with 10GB data is still NZ$9 cheaper than the next competitor's equivalent.

Medium Users (10-20GB)

Skinny Mid: NZ$24 per month, 20GB data. 2degrees Essential: NZ$28 per month, 15GB data. One NZ Standard: NZ$35 per month, 20GB data. Spark Everyday: NZ$39 per month, 20GB data. Skinny leads again, this time by NZ$4 to NZ$15 per month.

Heavy and Unlimited Users

Skinny Large: NZ$34 per month, 40GB data. Skinny Unlimited: NZ$49 per month, full-speed unlimited data. 2degrees Unlimited: NZ$59 per month. One NZ Unlimited: NZ$65 per month. Spark Unlimited: NZ$65 per month. Skinny's unlimited plan at NZ$49 is NZ$10 to NZ$16 cheaper than the major networks. On an annual basis, that saving is roughly NZ$120 to NZ$192.

The unlimited plans vary in the fine print. Spark and One NZ throttled speeds after a certain data threshold. Skinny's unlimited plan has no such throttle — it is genuinely unlimited full-speed data. The difference matters for heavy users who stream video, download large files, or tether to a laptop for work.

The Carrier Network Reality

New Zealand has three physical mobile networks: Spark, One NZ, and 2degrees. Skinny is a mobile virtual network operator on Spark's network. Warehouse Mobile runs on 2degrees. Kogan Mobile runs on the Vodafone (One NZ) network. The virtual operators get the same coverage as their host network — there is no difference in signal strength or data speed for the same cell tower.

Network congestion is the only variable that can differ between a virtual operator and its host. In theory, a host network could prioritise its own customers during peak congestion. In practice, this is not widely observed in New Zealand. Skinny customers report identical speeds to Spark customers in the same locations at the same times.

Other Options Worth Mentioning

Warehouse Mobile at NZ$35 per 28-day cycle for 6GB rollover data is competitive for medium users, and Kogan Mobile at NZ$25 per 30 days for 4GB deserves a look. But Skinny's 28-day billing cycle means 13 top-ups per year instead of 12 for calendar-month plans — worth factoring in if you are comparing annual costs to the cent.

Regional Coverage Note

Skinny runs on the Spark network, which has the best coverage in New Zealand's rural and regional areas. If you live outside the main centres, this matters. One NZ's network is strong in the South Island. 2degrees uses its own network in urban areas and roams on One NZ in rural areas. The cheapest plan is no use if your phone has no signal at your home address. Check the coverage map for each network at your specific location before making a decision.

For heavy data users on a budget, Skinny at NZ$49 for unlimited is the clearest recommendation in the entire NZ mobile market.

Prepaid vs Monthly

All the plans discussed above are monthly or 28-day plans billed to your account. An alternative is prepaid — you top up a certain amount and use the credit for calls, texts, and data. Skinny's prepaid offering is competitive, with data and call bundles at budget-friendly prices. Prepaid plans are useful for people who want absolute control over spending, for children's phones, or for backup SIMs. The trade-off is that unused credit may expire if not topped up regularly.

2degrees also offers a competitive prepaid option with rollover data and a well designed app for managing credit. For light users, prepaid can be cheaper than a monthly plan because you only pay for what you use.

Summing It Up

The New Zealand mobile market has a clear price leader in Skinny, offering the cheapest plans at every usage level while running on the best network by coverage area. The trade-off is limited customer service channels and no handset bundling. For anyone who owns their own phone, does not need in-store support, and wants the lowest possible mobile bill, Skinny is the answer. The savings across light and medium usage levels are significant enough that switching from a major network to Skinny is one of the easiest ways to reduce monthly expenses in New Zealand without losing any service quality.