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Wifi Calling

Wifi Calling
Wifi Calling
Wifi Calling

With Wifi Calling it’s easy to make and receive calls and texts in any location covered by Wifi across NZ or overseas, even when you have a weak or no mobile signal. ​

It works like a normal call, plus there’s no additional charge for One NZ customers as it will come out of your plan’s minutes.​

Easy to set up and even easier to use, simply check you have a compatible mobile phone that’s been updated with the latest software, then turn on Wifi Calling in your phone’s settings.​

See below for more information including supported phones and frequently asked questions.

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Easy to use
It’s simple to set-up, you just need to check that Wifi Calling is turned on in your phone settings.
More access
Connect inside or outside without a fuss – Wifi Calling connects automatically if you’re connected to Wifi and have a weak mobile signal.
No extra cost
Wifi Calling is free for One NZ customers to use. All calls you make come out of your allowance as usual

Check out our supported phones

The phones and devices shown below support Wifi Calling and SMS over Wifi, when bought from One NZ.

Devices bought from third parties or other NZ telecommunications companies might not be compatible with Wifi Calling.

Over time, as new software is released and updated on phones, we expect more devices to be enabled for Wifi Calling.​


Wifi Calling enabled devices (iOS 15 or later required).

  • iPhone 15
  • iPhone 15 Plus
  • iPhone 15 Pro
  • iPhone 15 Pro Max
  • iPhone 14
  • iPhone 14 Plus
  • iPhone 14 Pro
  • iPhone 14 Pro Max
  • iPhone 13
  • iPhone 13 mini
  • iPhone 13 Pro
  • iPhone 13 Pro Max
  • iPhone 12
  • iPhone 12 mini
  • iPhone 12 Pro
  • iPhone 12 Pro Max
  • iPhone 11
  • iPhone 11 Pro
  • iPhone 11 Pro Max
  • iPhone 8 Plus
  • iPhone 8
  • iPhone 7 Plus
  • iPhone 7
  • iPhone 6s Plus
  • iPhone 6s
  • iPhone SE (3rd Gen)
  • iPhone SE (2022)
  • iPhone SE (2nd Gen)
  • iPhone XS
  • iPhone XS Max
  • iPhone X
  • iPhone XR


Please note: Samsung A01 Core (SM-A013G) does not support Wifi Calling due to hardware limitations.

Wifi-Calling enabled
  • Galaxy A01 (SM-A015F/DS)
  • Galaxy A02s (SM-A025F/DS)
  • Galaxy A03 (SM-A035F/DS)
  • Galaxy A03s (SM-A037F/DS)
  • Galaxy A04 (SM-A045F/DS)
  • Galaxy A05 4G (SM-A055F)
  • Galaxy A05s 4G (SM-A057F/DS)
  • Galaxy A10 (SM-A105G)
  • Galaxy A11 (SM-A115F/DS)
  • Galaxy A12 (SM-A125F/DS)
  • Galaxy A12 (SM-A127F/DS)
  • Galaxy A13 (SM-A135F/DS)
  • Galaxy A14 (SM-A145F/DSN)
  • Galaxy A14 5G (SM-A146P/DSN)
  • Galaxy A15 5G (SM-155M/DSN)
  • Galaxy A20 (SM-A205GN)
  • Galaxy A21s (SM-A217F/DS)
  • Galaxy A22 (SM-A225F/DS)
  • Galaxy A22 (SM-A226B/DS)
  • Galaxy A23 (SM-A235F/DS)
  • Galaxy A24 4G
  • Galaxy A25 5G (SM-A256E/DS)
  • Galaxy A30 (SM-A305GN)
  • Galaxy A31 (SM-A315G/DS)
  • Galaxy A32 (SM-A325F/DS)
  • Galaxy A32 (SM-A326B/DS)
  • Galaxy A33 (SM-A336E/DSN)
  • Galaxy A34 (SM-A346E/DSN)
  • Galaxy A50 (SM-A505GN/DS)
  • Galaxy A51 (SM-A515F/DSN)
  • Galaxy A52 (SM-A525F/DS)
  • Galaxy A53 (SM-A536E/DS)
  • Galaxy A54 (SM-A546E/DS)
  • Galaxy A70 (SM-A705MN)
  • Galaxy A71 (SM-A715F)
  • Galaxy A72 (SM-A725F/DS)
  • Galaxy A73 (SM-A736B/DS)
  • Galaxy A80 (SM-A805F)
  • Galaxy A90 (SM-A908B)
  • Galaxy Fold (SM-F900F)
  • Galaxy Note10 (SM-N970F/DS)
  • Galaxy Note10+ 4G (SM-N975F/DS)
  • Galaxy Note10+ 5G (SM-N976B)
  • Galaxy Note20 (SM-N980F/DS)
  • Galaxy Note20 (SM-N981B/DS)
  • Galaxy Note20 Ultra 4G (SM-N985F/DS)
  • Galaxy Note20 Ultra 5G (SM-N986B/DS)
  • Galaxy S10 (SM-G973F)
  • Galaxy S10+ (SM-G975F)
  • Galaxy S10e (SM-G970F)
  • Galaxy S20 (SM-G980F/DS)
  • Galaxy S20 FE (SM-G780F/DS)
  • Galaxy S20 FE (SM-G780G/DS)
  • Galaxy S20 Ultra (SM-G988B/DS)
  • Galaxy S20+ 4G (SM-G985F/DS)
  • Galaxy S20+ 5G (SM-G986B/DS)
  • Galaxy S21 (SM-G991B/DS)
  • Galaxy S21 FE (SM-G990E/DS)
  • Galaxy S21 Ultra (SM-G998B/DS)
  • Galaxy S21+ (SM-G996B/DS)
  • Galaxy S22 (SM-S901E/DS)
  • Galaxy S22 Ultra (SM-S908E/DS)
  • Galaxy S22+ (SM-S906E/DS)
  • Galaxy S23 (SM-S911B/DS)
  • Galaxy S23 Ultra (SM-S918B/DS)
  • Galaxy S23+ (SM-S916B/DS)
  • Galaxy S23 FE 5G
  • Galaxy S24 5G
  • Galaxy S24 Ultra 5G
  • Galaxy S24+ 5G
  • Galaxy Tab A7 Lite 8.7" (SM-T225)
  • Galaxy Tab A8 (SM-X205)
  • Galaxy Tab A9 4G
  • Galaxy Tab Active4 Pro (SM-T636B)
  • Galaxy Tab S8 (SM-X706B)
  • Galaxy Tab S8 Ultra (SM-X906B)
  • Galaxy Tab S8+ (SM-X806B)
  • Galaxy Tab S9 5G
  • Galaxy Tab S9 Ultra 5G
  • Galaxy Tab S9+ 5G
  • Galaxy Tab S9 FE 128GB 5G
  • Galaxy Tab S9 FE+ 128GB 5G
  • Galaxy Xcover 5 (SM-G525F/DS)
  • Galaxy Xcover Pro (SM-G715FN)
  • Galaxy Xcover4s (SM-G398FN)
  • Galaxy Xcover6 Pro (SM-G736B/DS)
  • Galaxy XCover7 5G (SM-G556B)
  • Galaxy Z Flip (SM-F707B)
  • Galaxy Z Flip (SM-F700F/DS)
  • Galaxy Z Flip3 (SM-F711B)
  • Galaxy Z Flip4 (SM-F721B/DS)
  • Galaxy Z Flip 5 (SM-F731B)
  • Galaxy Z Fold2 (SM-F916B)
  • Galaxy Z Fold3 (SM-F926B/DS)
  • Galaxy Z Fold4 (SM-F936B/DS)
  • Galaxy Z Fold 5 (SM-SM-F946B)


Wifi-Calling enabled

Other devices

Updates about other devices will be shared as soon as information is available, and we’re working with phone manufacturers on a range of technical details. Unfortunately Huawei devices will not be enabled for Wifi Calling at any point in the future.

Wifi-Calling enabled

Got a question?

What is WiFi Calling?

WiFi Calling lets you make and receive calls over WiFi when there’s a weak mobile phone signal, either in New Zealand or overseas.
All devices connected to the WiFi Calling service will also send and receive texts over WiFi.
Within New Zealand, all calls will try to connect to the cellular (mobile) network first, and then try to use WiFi if the mobile signal is too weak. But if you’re overseas, then WiFi Calling will be automatically preferred.

How do I set up WiFi calling?

To turn on WiFi Calling, simply follow these steps:

    1. First, check if your phone supports WiFi Calling, by checking the phone-list shown on this page.
    2. Make sure you’ve updated your phone to use the latest software.
    3. Turn on WiFi Calling on your phone - in your settings.
    4. Connect to a WiFi network.

    Android: Go to your smartphone's settings, search for WiFi Calling and turn it on or off (many Android devices list WiFi Calling under Call Settings).

    Oppo: Turn on WiFi Calling in Settings > SIM card & mobile data > select SIM1/SIM2 > Wi-Fi calling

    iPhone: Turn on WiFi Calling in Settings > Phone > Wi-Fi Calling. Visit the Apple website for information about how to turn on WiFi Calling on your iPhone for detailed steps.

    Is WiFi Calling going to be available on my smartphone?

    We’re working with phone manufacturers to determine exactly which devices will be enabled for WiFi Calling and when.

    Newer-model One NZ-bought VoLTE phones and devices can use Wifi Calling.
    Some older model VoLTE phones such as iPhone 6 or parallel imported smartphones for example won't be able to connect due to the manufacturer settings. A non-One NZ iPhone 6S or newer model running iOS 15 should work with a One NZ SIM card.

    To check if your phone can use WiFi Calling, check out our Wifi Calling compatible list. New phones will be listed as they are released for sale.

    Note: WiFi Calling will became available for One NZ OneBusiness customers from December 8, 2021.

    What if my phone won’t work with WiFi Calling, what can I do?

    You may need to upgrade your phone to a newer device, and there will be a range of phones that will be Wifi Calling enabled, including more affordable devices. Please visit our online shop to check out new phones, and we offer a range of interest free payment options.

    Does WiFi Calling cost extra?

    There's no extra charge for enabling WiFi Calling if you're a One NZ customer. All calls you make use minutes from your plan allowance as usual, and international or special calling rates apply, and texts (SMS/MMS or TXT/PXT) messages will be charged as usual. Check your phone plan for more details.

    What is a good WiFi Connection?

    WiFi Calling requires a WiFi connection with at least 100-120 kbps bandwidth to ensure a better experience.
    Please note: local interference and WiFi traffic load may impact the WiFi Calling experience at certain times.

    My WiFi connection isn’t great; what options are available?

    If you have WiFi connection issues, you may want to check out SuperWifi. Customers on eligible broadband plans can get SuperWifi for wall-to-wall WiFi guaranteed or a $100 broadband credit.

    If you’re using an ADSL or VDSL connection that offers a weak WiFi signal, then upgrading to fibre or wireless broadband may be the best option for you. Please contact us to discuss your individual situation further.

    How will broadband data usage be charged when I’m using WiFi Calling?

    Broadband data is needed to use WiFi Calling. Costs to use WiFi Calling will depend on whether you have a broadband connection with One NZ, in addition to a mobile plan with One NZ.

    For One NZ broadband customers (fibre, wireless broadband, VDSL, ADSL):

    You will not be charged for broadband data used with WiFi Calling, which means you will only be charged once via your One NZ mobile phone plan. This means you can still use WiFi Calling even if you have run out of broadband data in your bundle (even if you’re not on an Unlimited data plan).

    If you use any other provider for your broadband connection:

    You will be incurring charges for WiFi and broadband data with that provider. This applies to Farmside customers and any companies using the One NZ network via a wholesale agreement.

    Will my phone drop out when it uses WiFi Calling?

    If you’re using a VoLTE registered phone and are connected to the One NZ 4G or 5G network, your call should automatically transfer between WiFi and the mobile signal, which means you shouldn’t get cut off while you're on the phone.

    A non-VoLTE phone will use WiFi Calling in suitable conditions, but not hand in and out of cellular, so may cut out. For example: when calls try to transfer between the 2G/3G network and WiFi, they will cut out.

    If you’re making an important phone call, we recommend ensuring you’ll be connected for the duration of the call to either: the 2G/3G mobile network, or a WiFi network. You can find the coverage area on our website:

    I bought my phone overseas. Can I use WiFi Calling?

    Newer model One NZ-bought VoLTE phones can use WiFi Calling.
    Phones or devices bought from third parties or other NZ telecommunications companies might not be compatible with WiFi Calling. A non-One NZ iPhone 6S or newer model running iOS 15 should work with a One NZ SIM, but we can’t guarantee this.

    Can I use WiFi Calling to call the emergency services?

    You can make emergency calls using WiFi Calling, but the phone will first try to use the mobile network (either One NZ or another mobile provider) before it uses WiFi Calling.

    When you are on Flight mode with WiFi turned on, and your phone is enabled to use WiFi Calling:

    • iOS: you will be prompted to turn off Aeroplane Mode (Flight Mode) to continue the call over WiFi.
    • Android: the device will switch off Aeroplane Mode (Flight Mode) and continue the call over WiFi.

    Will I receive Emergency Mobile Alerts with WiFi Calling?

    If you’re using WiFi Calling and have One NZ mobile coverage, you will receive the Emergency Mobile Alert. But if you’re using WiFi Calling in an area where you don’t have One NZ mobile coverage or Airplane mode is turned on, you won’t receive the Emergency Mobile Alert.

    For more information about the Emergency Mobile Alert, please visit the Civil Defence website:
    There is also a list of Emergency Mobile Alert capable phones on this government website:

    Will WiFi Calling still work if there’s a power cut?

    WiFi Calling is a mobile service that is enabled by a fixed broadband connection. If there’s a power cut affecting equipment used with fixed broadband connection (for example, a modem) then WiFi Calling won’t work. To make sure that Vulnerable Consumers using WiFi Calling are protected, we will apply the same protections and processes set out in the Commerce Commission's 111 Contact Code (“111 Code”).

    The 111 Code was created to ensure that Vulnerable Consumers have reasonable access to an appropriate means of calling 111 emergency services in the event of a power failure. Newer home phone services such as voice calling over broadband, which rely on an active working broadband service, won’t work in the event of a power failure without an independent power source. This is a fact of using modern communications technology – it’s is not unique to One NZ or to New Zealand.

    If you use WiFi Calling, you’ll be eligible to apply for the Vulnerable Consumer status if you (or someone in your household) is at particular risk of needing to call 111 emergency services for health, safety, or disability reasons, and you don’t have access to a traditional copper phone line. If you, or someone in your household, qualifies, One NZ will work with you to determine the right alternative 111 contact solution for your particular needs, and at no cost to you.

    Further information about the 111 Code and submitting an application to be added to the Vulnerable Consumer register is here:

    How will I know if WiFi Calling is being used?

    An icon will be displayed on your device, at the top of your screen.

    Can I use WiFi calling overseas?

    Yes you can.
    Just connect to any available WiFi - and turn on Wifi Calling to be able to call and TXT as if you are still in New Zealand. You don’t need to turn on Roaming to use Wifi Calling so you won’t be charged roaming rates however your minutes and TXTs used over Wifi Calling will come out of your mobile plan allowance.

    For example if you’re on a Prepay or Pay Monthly plan and call a NZ number using Wifi Calling while roaming overseas, this will come out of your plan allowance. If you call a local number in the country you’re travelling in, you’ll be charged the standard cost of calling an international number, like you would at home.

    If you don’t have an active Prepay plan and still use Wifi Calling while overseas, you’ll be charged standard Prepay rates.

    Please note: Calls will drop once you leave Wifi coverage and you will need to turn on Roaming to make a call.

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