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.
OCS01586_uderstanding_VoLTE_tile.png

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.
OCS01586_VoLTE_technology_tile.png

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

OCS01586_4G_5G_call_icon.svg

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.






OCS01586_capable_device_list_icon.svg

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

OCS01586_phone_software_icon.svg

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.



OCS01586_upgrading_your_phone_icon.svg

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 phones

One NZ has tested and approved a range of VoLTE and VoLTE roaming capable phones and 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 16eiPhone X
iPhone 16iPhone 8
iPhone 16 PlusiPhone 8 Plus
iPhone 16 ProiPhone 7
iPhone 16 Pro MaxiPhone 7 Plus
iPhone 15iPhone 6
iPhone 15 PlusiPhone 6 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 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 S25Galaxy S10
    Galaxy S25+Galaxy S10+
    Galaxy S25 UltraGalaxy S10e
    Galaxy S24 5GGalaxy S9
    Galaxy S24+ 5GGalaxy S9+
    Galaxy S24 FE 5GGalaxy A8
    Galaxy S24 Ultra 5GGalaxy A70
    Galaxy S23Galaxy A50
    Galaxy S23+Galaxy A30
    Galaxy S23 FE 5GGalaxy A20
    Galaxy S23 UltraGalaxy A14 5G
    Galaxy S22Galaxy A12 4G (SM-A125F)
    Galaxy S22+Galaxy A10
    Galaxy S22 UltraGalaxy A01
    Galaxy S21Galaxy A01 Core
    Galaxy S21+Galaxy J6
    Galaxy S21 FEGalaxy J5 Pro
    Galaxy S21 UltraGalaxy Note10+ 5G
    Galaxy S20Galaxy Note9
    Galaxy S20+ 4GGalaxy Note8
    Galaxy S20+ 5GGalaxy XCover 4s
    Galaxy S20 FE 4GGalaxy Tab A7 Lite
    Galaxy S20 Ultra
    Galaxy Z Fold6
    Galaxy Z Fold5
    Galaxy Z Fold4 5G
    Galaxy Z Fold3
    Galaxy Z Fold2 5G
    Galaxy Z Fold 4G
    Galaxy Z Flip6
    Galaxy Z Flip5
    Galaxy Z Flip4 5G
    Galaxy Z Flip3
    Galaxy Z Flip 5G
    Galaxy Z Flip
    Galaxy A90 5G
    Galaxy A80
    Galaxy A73
    Galaxy A72
    Galaxy A71
    Galaxy A56 5G
    Galaxy A55 5G
    Galaxy A54
    Galaxy A53
    Galaxy A52
    Galaxy A51
    Galaxy A36 5G
    Galaxy A35 5G
    Galaxy A34
    Galaxy A33
    Galaxy A32 5G
    Galaxy A32 4G
    Galaxy A31
    Galaxy A25 5G
    Galaxy A24 4G
    Galaxy A23
    Galaxy A21s
    Galaxy A16 5G
    Galaxy A15 5G
    Galaxy A14 4G
    Galaxy A13
    Galaxy A12 4G (SM-127F)
    Galaxy A11
    Galaxy A06
    Galaxy A05 4G
    Galaxy A05s 4G
    Galaxy A04
    Galaxy A03
    Galaxy A03s
    Galaxy A02s
    Galaxy Note20 Ultra 5G
    Galaxy Note20 Ultra 4G
    Galaxy Note20 5G
    Galaxy Note20 4G
    Galaxy XCover7
    Galaxy XCover6 Pro
    Galaxy XCover 5
    Galaxy XCover Pro
    Galaxy Tab S9 FE+ 128GB 5G
    Galaxy Tab S9 FE 128GB 5G
    Galaxy Tab S8
    Galaxy Tab S8+
    Galaxy Tab S8 Ultra
    Galaxy Tab S7 2020
    Galaxy Tab S7+ 2020
    Galaxy Tab Active 4 Pro
    Galaxy Tab Active 3
    Galaxy Tab A9 4G
    Galaxy Tab A8

    OPPO

    VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
    OPPO Reno13 5GOPPO A72
    OPPO Reno13 F 5GOPPO A53s
    OPPO Reno13 Pro 5G
    OPPO Reno12 5G
    OPPO Reno12 F 5G
    OPPO Reno12 Pro 5G
    OPPO Reno10 5G
    OPPO Reno10 Pro 5G
    OPPO Reno8 Lite
    OPPO Find X8 Pro
    OPPO Find X5
    OPPO Find X5 Lite
    OPPO Find X5 Pro
    OPPO Find X3 Lite
    OPPO Find X3 Pro
    OPPO Find X2 Lite
    OPPO Find X2 Pro
    OPPO Find N3 5G
    OPPO Find N2 Flip 5G
    OPPO A98 5G
    OPPO A80 5G
    OPPO A78 5G
    OPPO A77
    OPPO A74
    OPPO A58
    OPPO A57s
    OPPO A54
    OPPO A40
    OPPO A38

    One NZ/Smart

    VoLTE and VoLTE roaming enabledVoLTE, but NOT VoLTE roaming enabled
    Smart V25Smart X9
    Smart V22Smart T23
    Smart V12 4GSmart N12
    Smart V11 4GSmart N11
    Smart P24Smart N10
    Smart P12Smart E11
    Smart P11 4GSmart E9 16GB
    Smart M25B525
    Smart M23 Locked 4G
    Smart E25
    Smart E10
    Smart Green

    Huawei

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

    MobiWire

    VoLTE and VoLTE roaming enabled:
    • MobiWire Ogima 2

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

    Customer Impacting Events

    Mobile & Wireless Broadband ›
    Excellent Very Good Good Fair Low No Connection
    Fixed Line (Fibre, DSL, HFC) Broadband & Landline ›
    Excellent Very Good Good Fair Low No Connection
    main_icn_Play_arrow main_icn_Chevron_down main_icn_Chevron_right main_icn_Chevron_left main_icn_Chevron_up

    Internet Explorer Not Supported

    Please note that we do not support Internet Explorer. For optimal browsing we recommend Chrome, Safari, or Firefox.