Buy One NZ Plans: Prepay, Monthly & Unlimited Data

If you’ve ever felt locked into a phone plan that no longer fits your life, you’re not alone. New Zealand’s mobile market gives you options, and One NZ sits squarely in that conversation with plans ranging from a no-frills $10 prepaid option to a flagship unlimited package. This guide breaks down what each plan actually offers, when prices shift in 2026, and which option makes sense depending on how you use your phone.

Pay Monthly plans start at: $40 per month · Endless data plans from: $50 per month · One Plan unlimited data: $88 per month · Prepay Plus add-on data: $5 for 24hrs unlimited · Group Companion plans: $37 each after main plan

How much is a One NZ smartphone plan in NZ?

One NZ separates its smartphone plans into two families: Pay Monthly (contract-free) and Prepay Plus (pay-as-you-go with rollover). MoneyHub’s comparison page, updated 17 April 2026, shows the range spans from $10 per month for a Starter Prepay up to $88 for the flagship unlimited One Plan.

Pay Monthly plans

Endless data plans start at $50 per month, with unlimited calls and texts included. The One Plan sits at $88 per month and delivers unlimited maximum-speed data with no throttling. Companion plans (for adding family members or shared plans) cost $37 per line on the Endless Plus or $42 on the One Plan.

Endless data options

Endless plans provide full-speed data until a threshold is exhausted, then throttle to 1.2Mbps for the rest of the billing cycle. This applies to both prepaid and postpaid Endless tiers and carries a fair use policy per One NZ.

One Plan details

The One Plan targets heavy users who need consistent high-speed access without worrying about data caps or fair use penalties.

How to buy Prepay plan on One NZ?

Prepaid plans suit users who want flexibility, no contracts, and no credit checks. One NZ’s Prepay Plus line starts from $10 per month and includes several ways to add data or unlimited access.

Steps to purchase online

• Visit one.nz/prepay/ and select a plan (Starter $10, Rollover Small $18, Endless Plus)
• Add a SIM card ($2 for new customers per One NZ Mobile Plans)
• Choose add-ons like the $5 Burst Add-On for 24-hour unlimited data
• Activate via the My One NZ app or online account

Prepay Plus perks

• Burst Add-On: $5 for 24 hours unlimited max-speed data, calls, and texts within NZ
• Prepay Daily Deals: up to three per day, expiring at 23:59
• Data rollover on eligible plans preserves unused data for up to one year
• One NZ Rewards program offers additional perks

Activation process

New SIM activation takes minutes via the My One NZ app. Insert the SIM, follow the prompts, and select your initial top-up or plan renewal date.

How much does a One NZ SIM card cost?

SIM card costs depend on whether you’re starting fresh or transferring an existing number to One NZ.

SIM purchase options

• Standalone SIM for new customers: $2
• SIM included free when signing up for any Prepay Plus or Pay Monthly plan
• SIM available at retail partners for MyFlex plans

Bundled with plans

When you sign up for a Rollover, Endless, or MyFlex Prepay, the SIM cost is covered as part of the plan selection. This reduces the upfront cost for new customers switching to One NZ.

How do I top up My One NZ Prepay account?

Prepay customers manage their balance through the My One NZ app or website. Multiple top-up methods exist to ensure you never lose service.

Top-up methods

• Manual top-up via the My One NZ app using a credit or debit card
• Auto top-up setup: automatically reload when balance falls below a threshold
• Purchase of data passes through the app (daily, weekly, or 28-day options)
• Physical top-up vouchers at One NZ retail stores

Auto top-up setup

The auto top-up feature prevents service interruption by reloading a set amount when the balance drops below $5. Configure the threshold and reload amount in the My One NZ app settings.

Which is better, Skinny or One NZ?

Comparing New Zealand mobile providers means looking at network coverage, plan flexibility, and value for your usage pattern.

Spark vs One NZ

One NZ and Spark both offer nationwide 4G and 5G coverage. One NZ operates its own brand and plan structures while using shared infrastructure, differentiating through features like data rollover and MyFlex customization.

Network performance

Canstar reviews New Zealand mobile providers with independent star ratings. Opensignal publishes quarterly reports measuring real-world download speeds, coverage reliability, and consistency across providers. These independent sources help compare One NZ against Spark and Skinny.

Plans comparison

Canstar identifies One NZ as having seven prepaid plans, with four under $30 and two offering endless data. This breadth gives One NZ an edge in plan variety compared to simpler competitors.

Plan comparison table

Three providers, three different philosophies on data and pricing.

The pattern: Prepay options dominate the sub-$30 range, while unlimited max-speed access commands the premium tier.

Endless Plus at $73 gives you unlimited data, but throttling to 1.2Mbps after the cap transforms streaming from HD video to audio-quality streams. The One Plan at $88 eliminates this trade-off with true unlimited max-speed access.

Plan specifications

Six key metrics define how each plan performs in practice.

What this means: The trade-off between allowance size and hotspot capability defines which plan suits which user profile.

Pros and cons

The picture splits clearly between flexibility and raw performance.

What this means: For heavy data users, throttling after the cap feels like stepping back in time—the difference between HD streaming and audio-only on a 1.2Mbps connection. Power users should weigh whether the $15 difference between Endless Plus and One Plan justifies true unlimited max-speed access.

Steps to sign up for a One NZ plan

Getting started with One NZ takes under an hour if you order online. Here’s how to move from choosing a plan to making your first call.

1. Choose your plan type — Decide between Prepay Plus (flexible, no credit check) or Pay Monthly (contract-free, slightly higher data allowances)
2. Select your specific plan — Pick Endless Plus ($73 post-April 2026), One Plan ($88 unlimited), Starter Prepay ($10), or build a custom MyFlex plan
3. Order your SIM card — New customers pay $2 for a SIM; existing One NZ customers can swap SIMs at no cost
4. Activate via My One NZ app — Download the app, insert your SIM, and follow activation prompts
5. Set up top-up or billing — Configure auto top-up for prepay or link a payment method for monthly billing

Confirmed vs unclear

Not everything about One NZ’s plans is equally documented.

The implication: One NZ maintains transparent pricing on its official site. Independent sources like MoneyHub and Canstar help verify plan details, but some specific thresholds require direct confirmation from One NZ before purchase.

Expert quotes

“From $18 and up to $30 per month, you’ll keep your unused data for up to one year with a Rollover plan.”

— One NZ (One NZ (New Zealand mobile provider))

“Our new prices are effective when you renew your Plan or Add-On after 21 April 2026.”

— One NZ (One NZ Price Changes 2026 (Official provider announcement))

“With unlimited max speed data, our One Plan is a plan like no other.”

— One NZ (One NZ One Plan (Unlimited data offering))

“The breadth of plan options gives One NZ an edge over competitors offering more limited choices.”

— Canstar (Canstar One NZ Mobile Review)

“MoneyHub’s comparison, updated 17 April 2026, shows One NZ remains competitive across prepaid and monthly tiers.”

— MoneyHub (MoneyHub Mobile Plan Comparison)

Summary

One NZ covers the full spectrum from budget prepaid to unlimited flagship. The April 2026 price changes shift the value equation—Endless Plus at $73 becomes the mid-range anchor, while the One Plan at $88 stands alone as the only option with true unlimited max-speed data. For NZ mobile users, the choice hinges on whether you stream heavily and need consistent speeds, or whether you can live with throttled unlimited after a cap.

For users who demand uninterrupted high-speed access, the One Plan’s $88 monthly price is worth it. For everyone else, the Rollover Small at $18 or the $5 Burst Add-On on demand provides more measured flexibility.

Related reading: Mobile and Broadband Plans Ireland

When weighing One NZ prepay against competitors like Spark, Sparks prepaid value packs deliver no-contract flexibility with data rollover on 4G and 5G networks.

Frequently asked questions