Cheapest & Best Unlimited Data Mobile Plan NZ (2025 Comparison)

Looking for an unlimited data plan in New Zealand feels a bit like hunting for a unicorn — they’re advertised everywhere, but the fine print usually tells a different story. The cheapest advertised plan, One NZ’s Endless $50 offer, comes with a speed cap after a data threshold, and none of the major carriers provide truly unlimited high-speed data.

Major providers offering unlimited data: 3 (Spark, One NZ, 2degrees) ·
Starting price per month (One NZ Endless): NZD $50 ·
Spark’s equivalent plan price: NZD $65 (Endless Pay Monthly) ·
2degrees Unlimited Data plan price: NZD $69.99 ·
Speed cap on lowest-cost plans: Often 1.2–3 Mbps after initial high-speed data ·
Number of plans with true unlimited (no cap): 0 (all have throttling after threshold)

Here’s how the three major plans stack up head‑to‑head.

What is the cheapest unlimited mobile data plan in NZ?

Cheapest plan from One NZ

• One NZ’s Endless plan starts at NZD $50 per month, making it the lowest advertised unlimited data plan in the country (One NZ official (carrier website)). After 50GB of high-speed data, speeds drop to 1.2 Mbps.

Cheapest plan from Spark

• Spark’s Endless Pay Monthly plan begins at NZD $65 per month. It includes unlimited data but throttles to around 1.5 Mbps after 100GB on the entry tier (Spark NZ official (carrier website)).

Cheapest plan from 2degrees

• 2degrees Unlimited Talk & Data costs NZD $69.99 per month. It offers 120GB at full speed before throttling to 1 Mbps, and unused high-speed data rolls over (Mobile Phones NZ (plan comparison site)).

Warehouse Mobile and MVNO alternatives

• Warehouse Mobile’s Unlimited plan at $45/month is the cheapest overall, but caps high-speed data at 50GB before throttling to 1 Mbps (Mobile Phones NZ (plan comparison site)).
• Rocket Mobile offers unlimited data at 10 Mbps speeds for $75/month, with 20GB hotspot, powered by One NZ’s network (Rocket Mobile (MVNO, official site)).

The implication: the cheapest sticker price is $45 from Warehouse Mobile, but the trade-off is a low high-speed cap and aggressive throttling. One NZ’s $50 plan gives the most high-speed data per dollar among the big three.

Which provider has the best unlimited data mobile plan in NZ?

Criteria: price, speed, hotspot allowance, coverage

• Price: One NZ Endless $50 wins for base cost, but 2degrees offers better value with data carryover.
• Hotspot: One NZ includes 50GB high-speed hotspot on its $65 and $85 plans.
• Coverage: Spark leads in rural areas.
• 5G speeds: 2degrees averages 343 Mbps download, One NZ 313 Mbps, Spark 262 Mbps (Canstar (NZ comparison platform)).

Best for heavy streamers

• One NZ’s $85 Endless Max plan offers truly unlimited high-speed data with no throttling, plus satellite text capability.
• Spark’s $69 Endless plan includes Spotify Premium and no throttling on data, but hotspot is capped at 50GB.

Best for hotspot users

• One NZ’s Endless Plus ($65) provides 50GB high-speed hotspot, the largest allowance among the three. 2degrees limits hotspot to 10GB on its base plan, while Spark offers up to 50GB on higher tiers.

Best for light users

• Skinny’s $50 plan from Spark gives 6GB at full speed then endless throttled data, making it a cheap option for those who stay near Wi-Fi.

The pattern: there is no single “best” plan — the winner depends on whether you prioritise price, hotspot, coverage, or speed. One NZ leads on hotspot and price, Spark on rural coverage, 2degrees on data carryover.

What unlimited data plans does One NZ offer?

One Plan (retired but still active)

• The legacy One Plan provides unlimited data at max speeds with no throttling, but is no longer sold to new customers. Existing users keep it.

Endless plans: $50, $65, $85 tiers

• $50 Endless: unlimited data, 50GB high-speed, then 1.2 Mbps throttle, no hotspot included.
• $65 Endless Plus: 50GB high-speed hotspot, 250 mins/50 texts to 20 international destinations, satellite TXT add-on available.
• $85 Endless Max: truly unlimited high-speed data, no speed cap, includes satellite text and international calls.

Data allowances and speed caps per tier

• All Endless plans throttle after a monthly high-speed cap. The $50 plan caps at 50GB; $65 and $85 have higher or no caps.

One NZ’s strategy: segment users by data hunger. The $50 tier is a loss leader; the $85 tier is the only true “unlimited” option among the big three.

What are the unlimited data plans from Spark?

Spark Endless Pay Monthly

• Spark’s Endless Pay Monthly plans start at $65/month. They include unlimited calls and texts in NZ and Australia, and data throttles after a monthly cap varies by plan (e.g., 100GB on the $65 tier).

Spark Unlimited Data (retired plans)

• Older Spark unlimited plans are still active for existing customers, but new sign-ups use Endless Pay Monthly only.

Speed capping and hotspot limits

• After the full-speed data cap, Spark throttles to approximately 1.5 Mbps. Hotspot data is limited to 50GB on most plans.

Catch: Spark’s $69 plan includes Spotify Premium, a rare perk, but its hotspot allowance lags behind One NZ’s $65 plan.

Is there a free unlimited data mobile plan in NZ?

No carrier offers a completely free unlimited data plan. Some broadband bundles include temporary unlimited mobile data, but standalone plans always come with a monthly cost. Warehouse Mobile’s $45 prepaid plan is the cheapest entry point, but still not free.

How do unlimited data mobile plans in NZ compare on speed and fairness?

Speed after high-speed data cap

• One NZ: throttles to 1.2 Mbps on $50 plan, 1.5 Mbps on $65, no throttle on $85.
• Spark: throttles to ~1.5 Mbps after cap.
• 2degrees: throttles to 1 Mbps after 120GB full-speed data.

Fair use policy details

• 2degrees allows carryover of unused high-speed data to the next month, effectively giving more value for lighter months.
• One NZ and Spark do not offer data carryover on unlimited plans.

Network performance (4G vs 5G)

• 2degrees averages 343 Mbps down on 5G, One NZ 313 Mbps, Spark 262 Mbps.
• All three carriers offer 5G on their unlimited plans, but actual speeds depend on location and congestion.

Clarity: no carrier offers truly unlimited high-speed data on base tiers. The fairest policy belongs to 2degrees with its carryover, while One NZ and Spark rely on hard caps to manage bandwidth.

For a heavy hotspot user in Auckland, the choice is clear: One NZ’s $65 plan offers the best hotspot allowance, but the 50GB cap means you’ll be throttled after about 10 hours of HD streaming. Light users in rural areas will find Spark’s coverage a better trade-off for the higher monthly price.

Related reading: Cheap SIM Deals Vodafone – Best Ireland Plans Compared

For a closer look at what One NZ offers, check out this detailed guide on One NZ unlimited data plans.

Frequently asked questions