Cheap SIM Only Deals

Don't overpay on SIM-only mobile deals - We compare plans to cover all use-types, including low-users wanting 1GB of data, minutes and texts for less than $10/month

​Updated 17 May 2021
Smartphone contracts can end up costing a lot every month – but if you separate your phone from your mobile provider, you can save a lot with a SIM-only deal.

Whatever your needs and habits, there's a good chance you're paying to much at the moment. Switching to a cheaper provider is easy, and you can keep your number with no hassle. 

This guide lists everything you need to know when looking for a new SIM only plan and our top picks for low, medium and high data users, as well as covering entertainment packages and free data and minutes offers.

Looking specifically for a new iPhone with a 24 or 36-month plan? Use our Best iPhone Plan Review. ​

"SIM Only" Must-Know Facts and Tips

SIM only means you are not paying for a phone

All SIM only plans only cover a service which includes data, minutes and/or texts. You don't pay anything with regards to a phone device, as each plan requires you to have an existing phone.

The known networks are NOT the cheapest in most instances

New Zealand's recent arrival of Skinny and Warehouse Mobile offer cheaper data and calling bundles than the likes of Spark, Vodafone and 2Degrees. If you're with a big network, you're probably overpaying. 

Most SIM-only deals are for 28 days, 30 days or one month

This means you've got more flexibility to cancel, upgrade or downgrade the plan you pick. You can switch providers without paying penalties. 

Even though contracts are 30 days, you will probably have a credit check done

While this is mostly a formality, if you do have bad credit your application may be declined and you will need to stick to a pay-as-you-go SIM provider. See our credit score and credit reporting guide for more information. Also, if you're already paying off a phone you may be flagged as a higher risk customer.

Check the promotion and special offer details

There is no point signing up to an offer that locks you in for 12 months if the offer pricing or bonus data/minutes only applies for the first 3 months. Check out exactly what you’re paying over the entire contract period.

Pick a SIM Only plan that offers the allowance you NEED

Don’t overpay for things you don’t need. If you have internet at home and don’t watch TV on your phone, it’s unlikely you’ll need 10GB of data and unlimited minutes. 

You'll need to have an unlocked phone

Check your phone, as some phones from Telecom, Vodafone, Skinny and 2degrees will be SIM-locked to their networks. You can find out if the phone is locked by putting a SIM from another provider. To unlock your phone, you’ll need an IMEI number - you can find it by dialling *#06# on most phones or look for it on the label in the battery compartment, or on the box the phone came in.

Each provider’s website gives guidance about unlocking a phone, which is free if your phone is out of contract, or around $30 if it’s in a contract. Phones bought from overseas or via Trade Me will specify if they are unlocked or locked, so always buy an unlocked phone to save any hassle and extra costs.

Check the signal strength where you live and work

There is no point picking a provider if it doesn’t work in your lounge or bedroom. These links just need your address to show if you’ll get 3G or 4G

Switching from a contract to a SIM deal? Tell your current service provider ASAP!

Monthly plans usually require a month in advance notice, so as soon as you know you’re leaving the plan, advise your provider. You will have to pay the final month’s bill, so it’s best to buy the new provider’s sim first and organise your new deal to start as your current provider’s billing month finishes, therefore avoiding being stranded and paying twice for two plans at changeover time. 

Keeping your number is easy

Once you have a new provider’s SIM, you can submit a change of number request online via their website. It’s usually processed in one working day and you can call the new provider’s support team if you have any issues. 

Best SIM Only Phone Plans

Once you know which network(s) cover your home and work locations, and you know how much data you’ll need, look for the best deals that fit this. We’ve listed our best buys below, sorted by value for money and user types (low, medium and heavy).
 
As 4G covers around 95% of Kiwi homes and workplaces, all the below best buys come with 4G data (unless otherwise stated).

1. Low Users

For light users who want the convenience of a reasonable data limit and enough minutes, these are our best buys with 1GB+ data a month:
Kogan Mobile $15 Small 30 day plan
What you get: 1.5 GB data/month, unlimited texts and minutes within New Zealand and to Australia and free voicemail
Price: $15/month
Link: Kogan Mobile Plans

Kogan Mobile is a challenger and offers tremendous value for around 50 cents a day. The deal is effectively a Vodafone service at a fraction of the cost. It’s a 30 day rolling contract, but you can pay annually ($160) and save around 12%. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Vodafone retailer, and there are no Kogan Mobile stores. All support is either email or live chat-based. However, if you are happy to forgo face to face customer service, Kogan Mobile is by far the cheapest SIM-only offering in New Zealand.
 
Need-to-knows
Skinny $16 28-day Plan
What you get: 1..25 GB data/month, 200 minutes, unlimited texts within New Zealand and to Australia, free voicemail
Price: $16/month
Link: Skinny Plans

Skinny's entry deal isn't as competitive as Kogan Mobile by way of less data and capped minutes, although using the Spark network may make it more desirable for some users. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Spark or Skinny retailer. However, if you are happy to skip the face to face customer service, Skinny offers big savings to a medium data user.
 
Need-to-knows
  • 28 day rolling contract.
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • Skinny may increase the price at any time
  • You'll need to pass the credit check to get the plan
  • There is no top up - when you sign up for Skinny, you register your credit or debit card allowing you to buy plans and add-ons by using your card, without having to top up.
Warehouse $12 Combo
What you get: 500 MB, unlimited texts and 200 minutes of calls. Everyday rates are at 8 cents/minute, texts at 8 cents, 90-day rollover for credit. 
Price: $12
Link: Warehouse Mobile

Warehouse Mobile isn't as cheap as Kogan and arguably doesn't compete as well against Skinny, but the service is flexible, can be bought in-person and offers an affordable data/phone/text service for low users and/or the budget conscious. 
 
Need-to-knows
  • No contracts, just top up when you need to – unused credit (but not data or text/phone packs) rolls for 90 days
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • Warehouse Mobile may increase the price at any time
  • No credit check required, and you can be online in minutes with a new SIM.
  • Uses a 0284 number

2. Medium Users

For users wanting at least 4GB of data and unlimited, we’ve listed our two best buys below:
Kogan Mobile $25 Medium 30 day plan
What you get: 4 GB data/month, unlimited texts and minutes within New Zealand and to Australia and free voicemail
Price: $25/month
Link: Kogan Mobile Plans

Kogan Mobile is a challenger and offers tremendous value for around one dollar a day. The deal is effectively a Vodafone service at a fraction of the cost. It’s a 30 day rolling contract, but you can pay annually ($250) and save around 17%. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Vodafone retailer, and there are no Kogan Mobile stores. All support is either email or live chat-based. However, if you are happy to forgo face to face customer service, Kogan Mobile is by far the cheapest SIM-only offering in New Zealand.
 
Need-to-knows
Skinny $36 28-day Plan
What you get: 4.5 GB data/month, unlimited texts and minutes within New Zealand and to Australia, free voicemail
Price: $36/month
Link: Skinny Plans

​For not much more than $1/day, the Skinny plan runs on the Spark 4G network. It’s a one-month rolling contract so it’s flexible, and the data rolls over too. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Spark or Skinny retailer. However, if you are happy to skip the face to face customer service, Skinny offers big savings to a medium data user.

This plan offers excellent value for anyone who uses around 4.5 GB a month and makes a decent amount of calls. It's available to new customers, and existing Skinny customers who want to change plan.
 
Need-to-knows
  • 28 day rolling contract.
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • Skinny may increase the price at any time
  • You'll need to pass the credit check to get the plan
  • There is no top up - when you sign up for Skinny, you register your credit or debit card allowing you to buy plans and add-ons by using your card, without having to top up.

3. High Users

For the data demons, these are our two top picks with more than 8GB of 4G data each month, as well as a reasonable number of minutes:
Skinny $46 28-day Plan
What you get: Endless data/month capped at 12GB, unlimited texts and minutes within New Zealand and to Australia.
Price: $46/month
Link: Skinny Plans
Skinny’s 12GB Endless Data plan runs on the Spark 4G network, which is arguably New Zealand’s most comprehensive. It’s a one-month rolling contract so it’s flexible, and the data rolls over too. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Spark or Skinny retailer. However, if you are happy to skip the face to face customer service, Skinny offers big savings to a medium data user.
​
This plan offers excellent value for anyone who uses around 12GB a month and makes a decent amount of calls. It's available to new customers, and existing Skinny customers who want to change plan.
 
Need-to-knows
  • 28 day rolling contract.
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • Skinny may increase the price at any time
  • You'll need to pass the credit check to get the plan
  • There is no top up - when you sign up for Skinny, you register your credit or debit card allowing you to buy plans and add-ons by using your card, without having to top up.
Kogan Mobile $35 Large 30 day plan
What you get: 15 GB data/month, unlimited texts and minutes within New Zealand and to Australia and free voicemail
Price: $35/month
Link: Kogan Mobile Plans

Kogan Mobile's Vodafone-network-based service offers a huge 15 GB of data and unlimited calls for aroud $1 per day, and you can pay annually ($330) and save around 22%. You can only buy it online, meaning you won’t be able to troubleshoot any issues at a Vodafone retaile, and there are no Kogan Mobile stores. All support is either email or live chat-based. However, if you are happy to forgo face to face customer service, Kogan Mobile is by far the cheapest SIM-only offering in New Zealand. The data doesn't roll over, and unlike Skinny above it's not unlimited, but this plan is generous with its offering.
 
Need-to-knows
Two Degrees Mobile $60 Monthly Plan
What you get: 12GB endless data per month, unlimited texts and minutes within New Zealand and to Australia
Price: $60/month
Link: 2degrees Mobile

​2Degrees offers a 12GB on a one-month rolling contract so it’s flexible, and the data carryover too.
This plan offers decent value for anyone who uses around 12GB a month and makes a decent amount of calls. It's available to new customers, and existing 2Degrees customers who want to change plan. 

Need-to-knows
  • One-month rolling contract.
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • 2Degrees may increase the price at any time
  • You'll need to pass the credit check to get the plan

Best SIM-only Deals for Specific Purposes

Best Entertainment & Media Plan

Spark $39.99 Pay Monthly Plan
What you get: 3GB data, 300 minutes, unlimited New Zealand texts + Free Spotify and Lightbox Access
Price: $39.99/month
Link: Spark

You can roll over to a maximum of 3.5GB. The perks include half price of Spotify Premium and rollover data.
 
This is a fairly decent meaty all-inclusive offering from Spark, although 3GB may be a bit of a challenge for more aggressive data users. It's available to new customers, and existing Spark customers who want to change plan. 

Need-to-knows
  • One-month rolling contract.
  • Tethering is permitted within your data allowance.
  • You can keep your existing number
  • Spark may increase the price at any time
  • You'll need to pass the credit check to get the plan

Looking specifically for a new iPhone with a 24 or 36-month plan? Use our Best iPhone Plan Review. ​

Complain about your network using the Telecommunications Dispute Resolution (TDR)

Telecommunications Dispute Resolution (TDR) deals with complaints from consumers about any product or service provided by their telecommunications company. As the customer of a New Zealand network, you have the right to make a complaint. It's a free and independent service, but you will need to follow their process to progress a complaint.

Before you complain, you'll need to raise the issue with your network directly via their complaints form or customer service team
  • Once you have done this, you must wait for a response.
  • The network will respond, but if you are unable to agree with their response and your complaint becomes deadlocked, after six weeks has passed you can raise a complaint with the TDR.

The process of complaining with TDR is outlined here. Their helpful FAQs outline what you can expect, and case studies about recent complaints about telecommunication companies in general. The process is impartial, and once a decision is made, Your network will (usually) abide by the ruling should it be in the wrong.

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