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Set up One Number Wearable Plan

Learn how to activate One Number on your Apple Watch (GPS + Cellular).

To set up One Number, you'll need an iPhone 6s with iOS 13 (or later) on an eligible Primary Pay Monthly mobile plan and a compatible Apple Watch (GPS + Cellular) with watchOS 6 or later.

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About One Number

One Number from Spark is a way to use your phone number on your phone and your cellular watch. Two devices, one number. You can also make and receive calls and texts from your watch without being close to your phone.

You can get One Number when you sign up for a $12.99 One Number Wearable Plan ($11.30 excl. GST). It's a plan for cellular watches only. It lets you use the minutes and texts from your primary Spark Pay Monthly mobile plan on your watch. Plus, you always get unlimited data on the watch. 

Note: Max unlimited data speeds reduce after 40GB. No tethering or hotspots. You can only get text mesasges if your iPhone is turned on and connected to the network. 

What you'll need

To get One Number, first you'll need a compatible wearable device (that is, a smart watch) and phone. Check your device compatibility:

Apple Watch*

  • Apple Watch Series 3 (GPS + Cellular)
  • Apple Watch Series 4 (GPS + Cellular)
  • Apple Watch Series 5 (GPS + Cellular)

*Only models with LTE bands 3, 7 and UMTS 2100 MHz and 850 MHz are supported by the Spark network. Learn more about bands, supported locations and carriers at

Make sure you've installed the latest software (watchOS) from Apple. Here's how you can check for updates:

  1. On your iPhone, open the Watch app. 
  2. Go to General > Software Update.

You'll need watchOS 6 or later to get the One Number Wearable Plan from Spark.


You'll need an iPhone 6s or later. 

Make sure you've installed the latest software (iOS) from Apple. Here's how you can check for updates:

  1. On your iPhone, go to Settings > General > Software Update.
  2. Then go to Settings > General > About. 
  3. Follow the prompts to update to the latest carrier settings. 

You'll need iOS 13 or later to get the One Number Wearable Plan from Spark.

Spark Pay Monthly or Business mobile plan

You'll also need a Spark Pay Monthly or Business mobile plan.

See all Pay Monthly plans

See all Spark Business mobile plans

How to activate One Number Wearable Plan

Here's how you can activate the $12.99 One Number Wearable Plan from your iPhone. You can also set up the plan when you buy a watch online, or visit us instore.

New watch? Pair it with your iPhone first

If you want to use an Apple Watch that's not already paired to your iPhone, you'll need to pair it first. Here's how:

  1. Make sure Bluetooth is turned on for the iPhone and the Apple Watch.
  2. Open the Apple Watch app on your iPhone, then tap Pair New Watch.
  3. When prompted, position your iPhone so that your Apple Watch appears in the viewfinder in the Apple Watch app. This pairs the two devices.
  4. Tap Set Up Apple Watch. Follow the instructions on your iPhone and Apple Watch to finish setting up.

If your phone is dual SIM, make sure you take out the second SIM card (or turn off the second eSIM) before you pair your watch.

Activate the One Number Wearable Plan

When you pair your watch, you'll have the option to set up your mobile plan.

Set up mobile plan during pairing on iPhone

Choose Set Up Mobile to connect your watch to the Spark network now.

  1. You'll see the Spark log in page. Enter your email address and password. Choose Continue.
    • If you don’t have a MySpark account, go to
    • If you have a MySpark account but forgot your password, go to
    • If you've made changes to your MySpark account, restart the Watch app before continuing.
  2. Review the information about the $12.99 One Number Wearable Plan. (You'll only see this screen if your current mobile plan is compatible with One Number.) Choose Continue.
  3. Read the terms and conditions and tick I agree to the above Terms and Conditions. Choose Accept.
  4. Review plan details, including your primary line, and choose Sign up.
  5. You'll see a success screen. Choose Close.
  6. Wait 5–7 minutes for your plan to be activated. You'll get a text message from Spark to notify you when your plan is active.  

If you get an error message during the activation process, see how to fix it. Understand set up errors

Confirm the watch is connected

If you want to make sure your watch is connected, here's how:

  1. Turn off Bluetooth or move away from your phone.
  2. Now open the Control Centre on your watch. Make sure WiFi is off. If the cellular data icon is green, then your plan is working:

    Cellular connection active on Watch

  4. You can also check on your iPhone. Open the Watch app and look under Mobile. Spark NZ should show under Mobile Data Plan.

  5. Spark NZ active on Watch app on iPhone

Frequently asked questions (FAQ)

Get answers to common questions about Spark's One Number Wearable Plan.

When you activate your One Number plan from your watch, Spark picks up your primary mobile number and associates it with your wearable device. So whenever you get a call, the network routes the call to your primary mobile number. This means that both your watch and phone will ring. Same when you make calls and send and receive text messages.

When you make a call or send a text from your watch, your contacts will be none the wiser. People on the other end of your calls and texts will see your primary mobile number. That's it.

The $12.99 One Number Wearable Plan is billed just like your Spark Pay Monthly plan. Your One Number plan will appear underneath your primary mobile number. You can see an example of a bill with One Number here:

Example of Spark bill with One Number Wearable Plan

Your watch uses the voice minutes and text message limits of your primary plan. For example, if you have the $39.99 Pay Monthly plan with 300 minutes each month, any calls you make from your watch will subtract from these minutes. You can check your detailed usage at any time on the Spark app or online at

The cellular features of Apple Watch include reading and replying to text messages, calling, and streaming Apple Music. To use these features, you'll need to sign up for the One Number Wearable Plan with Spark.

This plan is a Pay Monthly plan that's billed on top of your primary Pay Monthly mobile plan. It costs $12.99 per month ($11.30 excl. GST).

New and existing Spark customers can sign up for the One Number Wearable Plan, as long as you have a Pay Monthly or Business mobile plan. 

Prepaid and Corporate customers can't get the plan at this time.

No, you'll have the same mobile number on both your Apple Watch and your iPhone with the One Number Wearable Plan from Spark. 

If you want to have separate mobile numbers for your watch and your phone, take a look at some of our other smart watches. 

Besides the devices listed on this page, we can’t confirm whether a specific phone or watch will work with One Number. 

We're continually improving and expanding our One Number capability, so we hope to add support for more devices soon. 

Currently, One Number from Spark is only available on the $12.99 One Number Wearable Plan with Apple Watch (GPS + Cellular). See "What you'll need above" to learn more. 

You can have up to two Apple Watches on your Spark account, with a few caveats: 

  • You'll need two separate $12.99 One Number Wearable Plans, one for each watch.
  • Only one watch can be worn at a time. Turn on Auto Switch in your phone's Watch app to make sure the watch you're wearing is active.
  • Both watches will share the number of your iPhone. This means you'll only get calls, messages and data on the Apple Watch that you're currently wearing. 

Both watches will share your activity and workout information to your iPhone. You can see your daily move, exercise and stand progress in the Activity app on your iPhone. It just might take a minute for all the data to sync.

You might accidentally delete your eSIM profile. This happens if you restore factory settings on your Apple Watch.

If you delete your eSIM profile, you’ll need to pair your watch again. Use the instructions above to pair your Apple Watch with your iPhone.

To delete the One Number Wearable Plan for your Apple Watch, you’ll need to call us on 123 or visit a Spark store. Find your nearest store

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