VoLTE and VoLTE roaming. VoLTE and VoLTE roaming.

VoLTE voice calling over 4G and 5G

When you start using a VoLTE-capable phone, you'll notice the amazing clear call quality, fewer dropped calls and the quick call setup time.
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Understanding VoLTE


VoLTE stands for 'Voice over Long Term Evolution', which is part of 4G and 5G mobile network communication standards. So it's a more modern technology, and it is much improved on the older cellular technology that it replaces.

If you have a VoLTE-capable phone, voice calls will work on 4G and 5G networks here in NZ. Enabling 4G voice-calling means better connectivity to the mobile network and much clearer call quality.

VoLTE technology is a core part of the 4G and 5G standards and will continue to be used well into the future.
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What VoLTE technology means for you


VoLTE works over 4G and 5G to ensure call continuity and a smooth experience. You'll experience crystal-clear sound on calls (reduced background noise) and a quicker call connection and fewer dropped calls. There'll also be less disruption when you simultaneously download content, browse social media and receive calls.

How to get enabled for VoLTE 4G and 5G voice calling

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Check your 4G and 5G network coverage


  • You can easily check 4G and 5G network coverage using our mobile coverage maps.
  • One NZ will continue to roll out more coverage over time, so if you are not within coverage yet, keep checking.






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Check your phone VoLTE and/or VoLTE roaming


Check the list of VoLTE/VoLTE roaming devices that are supported in New Zealand. Keep in mind the following:
  • For iPhone users, VoLTE is supported on all models from iPhone 6 onwards
  • For Android users, VoLTE is supported on many phones as shown on the list below

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Check your phone software


  • Ensure that your phone software (e.g. iOS for Apple or Android for Samsung) is up-to-date.
  • If needed, you can prompt this update yourself in your phone settings.



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Check your phone settings


  • Ensure that your phone settings are enabled for 4G/5G data and/or VoLTE.
  • NOTE: If you still can’t connect to VoLTE, try turning your phone on and off again while in an area with good mobile coverage. In some instances, your SIM may need to be enabled for VoLTE, so please contact us for support if this applies to you.

Where VoLTE is available today

One NZ customers can access 4G and 5G voice calling anywhere in New Zealand that offers 4G or 5G coverage.

VoLTE while roaming overseas


VoLTE roaming is becoming the main way to make voice calls while travelling overseas and we are enabling this with an increasing number of our roaming partners.

This will let you experience enhanced VoLTE quality while travelling overseas. However, you will need to check the phone list below to ensure that your phone supports VoLTE roaming in addition to VoLTE.

Most phones do but there are a few exceptions as noted.




2G/3G roaming shutdown and VoLTE roaming


Many overseas networks have already shut down their 2G/3G networks and many more will do so in the near future. All 2G/3G networks in Australia, U.S., Puerto Rico, Singapore and Taiwan have already shutdown. New Zealand, China, Iceland, Israel, Nigeria and Norway all have announced closures for December 2025.

This means that you must have a VoLTE roaming-enabled phone to make or receive 4G/5G calls in these destinations.

Learn more about roaming overseas and 3G networks.

One NZ’s 3G network shutdown


We have announced the future shutdown of our 3G network.

See the local 3G network shutdown details.














Please note that even if your phone doesn’t work for VoLTE roaming while overseas, you will still be able to use 4G data and text.

VoLTE/VoLTE roaming capable devices

One NZ has tested and approved a range of VoLTE and VoLTE roaming capable devices as listed below.

If your phone was not purchased from One NZ (for example via another network operator, parallel importer or overseas) but it is the same phone model as listed below, then it is likely to operate correctly although we cannot guarantee this.

If your phone model is not listed below then we cannot tell how it will work for mobile services in NZ or while roaming overseas.

Alcatel

VoLTE and VoLTE roaming enabled:
  • 30.82 4G Flip
  • 4043

Apple

VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
iPhone 16iPhone X
iPhone 16 PlusiPhone 8
iPhone 16 ProiPhone 8 Plus
iPhone 16 Pro MaxiPhone 7
iPhone 15iPhone 7 Plus
iPhone 15 PlusiPhone 6
iPhone 15 ProiPhone 6 Plus
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 6S
iPhone 6S Plus
iPhone XS
iPhone XS Max
iPhone XR
iPhone SE (3rd Generation)
iPhone SE (2nd Generation)
iPhone SE (1st Generation)

    Samsung

    VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
    Galaxy A02sGalaxy A01
    Galaxy A03Galaxy A01 Core
    Galaxy A03sGalaxy A10
    Galaxy A04Galaxy A14 5G
    Galaxy A05 4GGalaxy A20
    Galaxy A05s 4GGalaxy A30
    Galaxy A06Galaxy A50
    Galaxy A11Galaxy A70
    Galaxy A12 4GGalaxy A8
    Galaxy A13Galaxy J5 Pro
    Galaxy A14 4GGalaxy J6
    Galaxy A15 5GGalaxy Note10+ 5G
    Galaxy A16 5GGalaxy Note9
    Galaxy A21sGalaxy Note8
    Galaxy A23Galaxy S10
    Galaxy A24 4GGalaxy S10+
    Galaxy A25 5GGalaxy S10e
    Galaxy A31Galaxy S9
    Galaxy A32 4GGalaxy S9+
    Galaxy A32 5GGalaxy Tab A7 Lite
    Galaxy A33Galaxy XCover 4s
    Galaxy A34
    Galaxy A35 5G
    Galaxy A51
    Galaxy A52
    Galaxy A53
    Galaxy A54
    Galaxy A55 5G
    Galaxy A71
    Galaxy A72
    Galaxy A73
    Galaxy A80
    Galaxy A90 5G
    Galaxy Note20 4G
    Galaxy Note20 5G
    Galaxy Note20 Ultra 4G
    Galaxy Note20 Ultra 5G
    Galaxy S20
    Galaxy S20 FE 4G
    Galaxy S20 Ultra
    Galaxy S20+ 4G
    Galaxy S20+ 5G
    Galaxy S21
    Galaxy S21 FE
    Galaxy S21 Ultra
    Galaxy S21+
    Galaxy S22
    Galaxy S22 Ultra
    Galaxy S22+
    Galaxy S23
    Galaxy S23 FE 5G
    Galaxy S23 Ultra
    Galaxy S23+
    Galaxy S24 5G
    Galaxy S24 FE 5G
    Galaxy S24 Ultra 5G
    Galaxy S24+ 5G
    Galaxy Tab A8
    Galaxy Tab A9 4G
    Galaxy Tab Active 3
    Galaxy Tab Active 4 Pro
    Galaxy Tab S7 2020
    Galaxy Tab S7+ 2020
    Galaxy Tab S8
    Galaxy Tab S8 Ultra
    Galaxy Tab S8+
    Galaxy Tab S9 FE 128GB 5G
    Galaxy Tab S9 FE+ 128GB 5G
    Galaxy XCover Pro
    Galaxy XCover 5
    Galaxy XCover6 Pro
    Galaxy XCover7
    Galaxy Z Flip
    Galaxy Z Flip 5G
    Galaxy Z Flip3
    Galaxy Z Flip4 5G
    Galaxy Z Flip5
    Galaxy Z Flip6
    Galaxy Z Fold 4G
    Galaxy Z Fold2 5G
    Galaxy Z Fold3
    Galaxy Z Fold4 5G
    Galaxy Z Fold5
    Galaxy Z Fold6

    OPPO

    VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
    OPPO A38OPPO A53s
    OPPO A40OPPO A72
    OPPO A54
    OPPO A57s
    OPPO A58
    OPPO A74
    OPPO A77
    OPPO A78 5G
    OPPO A80 5G
    OPPO A98 5G
    OPPO Find N2 Flip 5G
    OPPO Find N3 5G
    OPPO Find X2 Lite
    OPPO Find X2 Pro
    OPPO Find X3 Lite
    OPPO Find X3 Pro
    OPPO Find X5
    OPPO Find X5 Lite
    OPPO Find X5 Pro
    OPPO Find X8 Pro
    OPPO Reno8 Lite
    OPPO Reno10 5G
    OPPO Reno10 Pro 5G
    OPPO Reno12 5G
    OPPO Reno12 F 5G
    OPPO Reno12 Pro 5G

    One NZ/Smart

    VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
    Smart E25B525
    Smart E10Smart E11
    Smart GreenSmart E9 16Gb
    Smart M23 Locked 4GSmart N10
    Smart M25Smart N11
    Smart P11 4GSmart N12
    Smart P12Smart T23
    Smart P24Smart X9
    Smart V11 4G
    Smart V12 4G
    Smart V22
    Smart V25

    Huawei

    VoLTE, but NOT VoLTE roaming enabled:
    • B818
    • H122
    • Nova 5T
    • P20
    • P20 Pro
    • P30
    • P30 Pro

    MobiWire

    VoLTE, but NOT VoLTE roaming enabled:
    • MobiWire Hinto
    • MobiWire Hinto 2
    • MobiWire Ogima

    TP-Link Deco

    VoLTE, but NOT VoLTE roaming enabled:
    • X80-5G

    Recently supplied B525 modems will receive a firmware upgrade over the network, with no intervention required by customers.

    Frequently asked questions

    Is VoLTE enabled by default?

    Older iPhone models may need to have VoLTE switched on manually. To do this, look under Settings>Mobile>Mobile Data Options>Enable 4G Voice and Data. Newer models have VoLTE enabled by default.

    For Samsung handset users, VoLTE is set to be on by default for VoLTE capable devices. You will see “VoLTE” shown at the top of their screen when it is available.

    Is VoLTE the same as HD Voice?

    HD Voice is also known as "Wideband audio", and it's sometimes called 'advanced calling'. HD Voice works by extending the frequency range of the sound transmitted for phone calls.

    VoLTE is a newer standard, that incorporates the HD Voice standard, specifically using the AMR-WB audio codec. While it's technically different, Voice over LTE (VoLTE) also provides crystal clear calling, delivered over 4G and 5G.

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