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.
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.
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
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.
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
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.
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
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.
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 enabled | VoLTE, but NOT VoLTE roaming enabled |
| iPhone 16 | iPhone X |
| iPhone 16 Plus | iPhone 8 |
| iPhone 16 Pro | iPhone 8 Plus |
| iPhone 16 Pro Max | iPhone 7 |
| iPhone 15 | iPhone 7 Plus |
| iPhone 15 Plus | iPhone 6 |
| iPhone 15 Pro | iPhone 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 enabled | VoLTE, but NOT VoLTE roaming enabled |
| Galaxy A02s | Galaxy A01 |
| Galaxy A03 | Galaxy A01 Core |
| Galaxy A03s | Galaxy A10 |
| Galaxy A04 | Galaxy A14 5G |
| Galaxy A05 4G | Galaxy A20 |
| Galaxy A05s 4G | Galaxy A30 |
| Galaxy A06 | Galaxy A50 |
| Galaxy A11 | Galaxy A70 |
| Galaxy A12 4G | Galaxy A8 |
| Galaxy A13 | Galaxy J5 Pro |
| Galaxy A14 4G | Galaxy J6 |
| Galaxy A15 5G | Galaxy Note10+ 5G |
| Galaxy A16 5G | Galaxy Note9 |
| Galaxy A21s | Galaxy Note8 |
| Galaxy A23 | Galaxy S10 |
| Galaxy A24 4G | Galaxy S10+ |
| Galaxy A25 5G | Galaxy S10e |
| Galaxy A31 | Galaxy S9 |
| Galaxy A32 4G | Galaxy S9+ |
| Galaxy A32 5G | Galaxy Tab A7 Lite |
| Galaxy A33 | Galaxy 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 enabled | VoLTE, but NOT VoLTE roaming enabled |
| OPPO A38 | OPPO A53s |
| OPPO A40 | OPPO 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 Reno8 Lite | |
| OPPO Reno10 5G | |
| OPPO Reno10 Pro 5G | |
| OPPO Reno12 5G | |
| OPPO Reno12 F 5G | |
| OPPO Reno12 Pro 5G |
One NZ
| VoLTE and VoLTE roaming enabled | VoLTE, but NOT VoLTE roaming enabled |
| Smart E25 | B525 |
| Smart E10 | Smart E11 |
| Smart Green | Smart E9 16Gb |
| Smart M23 Locked 4G | Smart N10 |
| Smart M25 | Smart N11 |
| Smart P11 4G | Smart N12 |
| Smart P12 | Smart T23 |
| Smart P24 | Smart X9 |
| Smart V11 4G | |
| Smart V12 4G | |
| Smart V22 |
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 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.
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.
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.