Unlimited Data Mobile Plan NZ: Compare Spark, One NZ, 2degrees

Few things cause more head-scratching than shopping for an unlimited data mobile plan in New Zealand. Spark, One NZ, and 2degrees all promise unlimited data, but the fine print tells a different story. Only Spark’s Endless and One NZ’s Unlimited Max avoid throttling entirely, according to Mobile-Phones.co.nz (NZ mobile plan aggregator). This comparison cuts through the marketing to show what you’ll actually get.

Major NZ providers with unlimited plans: 3 (Spark, One NZ, 2degrees) ·
Typical speed throttle after fair use: 1.2Mbps to 3Mbps ·
Lowest advertised price for unlimited: $25/month (MobileCompare launch offer) ·
Number of unlimited plan options: 5+ across providers

Four key facts summarise the market. The average monthly price across major unlimited plans is $75, with typical throttle speeds between 1.2Mbps and 3Mbps after a fair use threshold of 50GB to 60GB.

Which mobile plan is best for unlimited data?

Top unlimited data plans from major NZ providers

• Spark Endless (Pay Monthly): $69/month – truly unlimited, no speed cap, but deprioritised after 60GB in congested areas (Mobile-Phones.co.nz).
• One NZ Unlimited Max: $85/month – truly unlimited high-speed data, hotspotting allowed without extra charges (Mobile-Phones.co.nz).
• 2degrees Unlimited Talk & Data: $75/month – throttled to 1Mbps after 120GB of high-speed data (Mobile-Phones.co.nz).
• Warehouse Mobile Unlimited Everything: $45/month – slows to 1Mbps after 50GB (Mobile-Phones.co.nz).

Key features to compare: price, speed, and throttling

Three plans, one pattern: the cheapest option isn’t the best value if you need consistent speeds.

The implication: if you stream video or hotspot often, avoid any plan with a hard speed cap. Only Spark Endless and One NZ’s offering keep you at full speed all month.

Which mobile network is the best in NZ?

Coverage comparison between Spark, One NZ, and 2degrees

• All three major networks cover over 95% of populated areas with 4G (MoneyHub.co.nz).
• One NZ has stronger rural coverage, while Spark leads in urban consistency (MoneyHub.co.nz).
• 2degrees offers competitive urban performance but fell to the bottom of Consumer NZ’s rankings for plan transparency since 2022 (Consumer NZ).

Network speed and reliability based on independent reports

Two networks, one standout: One NZ’s rural reach gives it an edge for travellers, while Spark’s urban consistency suits city dwellers. Opensignal reports (not independently verified for 2025) show One NZ ahead in coverage reach, but Spark wins on reliability. The trade-off: plan choice depends more on where you live than on price.

Is unlimited data really unlimited?

Fair usage policies and throttling

• All NZ unlimited plans have fair use policies (MoneyHub.co.nz).
• Speeds are typically capped after a certain threshold (e.g., 2degrees at 120GB, Warehouse at 50GB) (Mobile-Phones.co.nz).
• Kiwi Mobile caps at 1.2Mbps after data limit, making streaming impractical (Canstar.co.nz).

What “unlimited” means in practice

Three distinct categories emerge: “truly unlimited” (Spark Endless, One NZ Unlimited Max) with no hard throttle; “deprioritised” where speed drops only when the network is busy; and “capped and throttled” where after a data allowance you’re stuck at 1Mbps. Marketing calls them all “unlimited”, but the experience is vastly different.

The pattern: the more you pay, the fewer restrictions you face. True unlimited costs a premium but avoids the frustration of throttled speeds.

Is it worth getting unlimited data?

Who benefits most from unlimited data

• Heavy users who hotspot or stream video daily benefit from true unlimited plans (Consumer NZ).
• Average NZ data usage is around 10GB–20GB per month, far below typical unlimited caps (MoneyHub.co.nz).
• Limited plans may be cheaper for light users who never exceed 10GB (Canstar.co.nz).

Cost comparison with limited data plans

Four price tiers, one divide: unlimited plans start at $45 (Warehouse) but throttle; true unlimited costs $69 or more. A 10GB plan often runs $30–$40. For moderate users, the premium for true unlimited ($30–$45 extra) buys convenience but may not pay off.

What this means: your data habits should drive your choice, not the marketing label.

Who has the best price for unlimited data?

Price comparison across providers

• MobileCompare launch offer at $25/month (limited-time) (Canstar.co.nz).
• Spark’s Endless plan starts at $69/month (Mobile-Phones.co.nz).
• One NZ Unlimited Max is $85/month (Mobile-Phones.co.nz).
• 2degrees Unlimited Talk & Data is $75/month (Mobile-Phones.co.nz).
• Warehouse Mobile Unlimited Everything is $45/month (Mobile-Phones.co.nz).

Promotional and launch offers

The cheapest entry point is $25/month from MobileCompare, but that’s a loss leader – it uses Kiwi Mobile’s throttled network (1.2Mbps after limit). The real budget choice for unthrottled data is Spark’s $69 plan. One NZ charges a premium for its hotspot-friendly policy.

Cheapest true unlimited: Spark Endless at $69/month ·
Cheapest overall (throttled): MobileCompare $25/month ·
Premium for hotspot freedom: One NZ at $85/month

The pattern: price correlates with freedom. Pay less than $69 and you accept a speed cap.

The takeaway: if you need consistent high speeds, the premium is unavoidable.

Pros and cons of unlimited data plans in NZ

Balanced against each other, the benefits of unlimited data are real only if you pick the right plan. The downsides stem largely from misleading marketing.

Confirmed vs unclear: what we know and what’s murky

Confirmed facts

• Spark, One NZ, and 2degrees offer unlimited data plans (Mobile-Phones.co.nz).
• Kiwi Mobile plans have a hard speed cap of 1.2Mbps after data limit (Canstar.co.nz).
• All plans include fair use policies (MoneyHub.co.nz).
• Consumer NZ noted in 2025 that plan transparency from providers has not improved (Consumer NZ).

What remains unclear

• Exact throttle speed for One NZ after fair use is not publicly specified (MoneyHub.co.nz).
• Long-term price stability of promotional offers like MobileCompare’s $25 deal (Canstar.co.nz).
• Real-world speed test results under heavy usage are not independently published (Consumer NZ).
• Whether Spark’s deprioritisation after 60GB significantly affects everyday use is not backed by third-party tests.

These gaps mean consumers still have to rely on provider claims rather than independent data.

What providers and experts say

Kiwi Mobile has two phone plans that deliver unlimited data, capped at download speeds of 1.2Mbps.

Canstar (NZ comparison platform)

Carry on using your endless data to hotspot without worry.

One NZ (official provider statement)

Unlimited* Data plan for heavy-hitting hotspotters.

2degrees (official provider statement)

Three views, one thread: the asterisk matters. Only One NZ explicitly endorses unlimited hotspotting; 2degrees and Kiwi Mobile add caveats.

For NZ consumers, the choice is clear: if you average under 20GB a month, a capped plan from any provider is cheaper. If you live on mobile data – streaming, gaming, hotspotting – pay for One NZ Unlimited Max or Spark Endless and skip the throttled “unlimited” traps. The alternative is frustration at 1.2Mbps when you need speed most.

For a detailed breakdown of what One NZ offers, check out this comparison of One NZ unlimited data plans.

Frequently Asked Questions

Ultimately, the right unlimited plan depends on how much data you actually use and whether you need consistent high speeds. Heavier users should prioritise Spark Endless or One NZ Unlimited Max; lighter users can safely opt for a throttled plan and save money.

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