This is important to ensure your phone can make voice calls on 4G in the future. You may have heard of VoIP for your home phone and NBN. VoLTE is a similar thing but for mobile and will allow your phone to make a voice call on 4G. You might see it called HD Voice elsewhere. Our calls on 3G are already High Quality, and we are due to make VoLTE available to customers in 2022.

VoLTE (Voice over LTE) is the technology that enables voice calls to be made on the Optus 4G Plus network. VoLTE is available everywhere the Optus 4G Plus network reaches. With VoLTE you'll notice some great enhancements, such as great audio quality, faster call connection times as well as the ability to talk and browse at the same time when on a 4G connection.

We are progressively enabling customers with VoLTE over the coming months, and we will notify you when it's ready.

To activate VoLTE, customers will need to turn 4G voice on in their device network settings. Check out our list of popular compatible devices below, or check with your device manufacturer if it is VoLTE-compatible.

SETUP VOLTE ON APPLE DEVICES

• Tap Settings icon on Home screen
• Tap Mobile menu item
• Tap Mobile Data Options menu item
• Tap Enable 4G menu item
• Select the Voice & Data option to enable VoLTE

SETUP VOLTE ON SAMSUNG DEVICES

• Open Apps icon
• Locate Settings Icon
• Click Mobile Networks
• Select VoLTE to enable on the device.

ENABLE VOLTE ON GOOGLE PIXEL DEVICES

• Open Apps icon
• Locate Settings icon
• Tap Network & Internet
• Tap Mobile network
• Select VoLTE to enable on the device.

ENABLE VOLTE ON OTHER ANDROID DEVICES

The exact steps you will need to follow to enable VoLTE may differ slightly depending on your device, but generally you will need to:

• Open Apps icon
• Locate Settings icon
• Click Mobile Networks
• Select VoLTE to enable on the device.

Check if your device is compatible using the list of popular phones below. Newer devices should be VoLTE-compatible (newer Apple iPhones, Samsung Galaxy and Pixel phones to name a few), but check with your manufacturer if you can't find your device on this list.

Ensure your device software is up-to-date.

APPLE

• iPhone 13 Pro Max
• iPhone 13 Pro
• iPhone 13 mini
• iPhone 13
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 12 Mini
• iPhone 12
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone X
• iPhone 8
• iPhone 8 Plus
• iPhone 7
• iPhone 7 Plus
• iPhone 6
• iPhone 6 Plus
• iPhone 6s
• iPhone 6s Plus
• iPhone SE

SAMSUNG

• Samsung Galaxy Fold2 5G (SM-F916B)
• Samsung Galaxy Fold (SM-F900F)
• Samsung Galaxy Z Flip (SM-F700F)
• Samsung Galaxy Z Flip 5G (SM-F707B)
• Samsung Galaxy Note10+ (SM-N975F)
• Samsung Galaxy Note10+5G (SM-N976B)
• Samsung Galaxy S21 5G (SM-G991B)
• Samsung Galaxy S21+ 5G (SM-G996B)
• Samsung Galaxy S21 Ultra 5G (SM-G998B)
• Samsung Galaxy S20 4G (SM-G980F)
• Samsung Galaxy S20 5G (SM-G981B)
• Samsung Galaxy S20+ 5G (SM-G986B)
• Samsung Galaxy S20 Ultra 5G (SM-G988B)
• Samsung Galaxy S20 FE (SM-G780F)
• Samsung Galaxy S20 FE 5G (SM-G781B)
• Samsung Galaxy Note 20 5G (SM-N981B)
• Samsung Galaxy Note 20 Ultra 5G (SM-N986B)
• Samsung Galaxy A30 (SM-A305YN)
• Samsung Galaxy A50 (SM-A505YN)
• Samsung Galaxy A51 (SM-A515F)
• Samsung Galaxy A52 5G (SM-A526B)
• Samsung Galaxy A90 (SM-A908B)

GOOGLE PIXEL

• Google Pixel 3
• Google Pixel 3XL
• Google Pixel 4
• Google Pixel 4 XL
• Google Pixel 5

OTHER ANDROID DEVICES

• LG G5
• HTC 10
• HTC U11
• Sony Xperia XZ Premium
• Huawei Vogue Dual SIM
• Huawei Elle Dual SIM
• Huawei P30 Lite Dual SIM
• Nokia 3310
• Razer Phone 2
• Bullitt S61
• Bullitt B35
• Bullitt S52
• realme C3 (RMX2020)
• realme C21 (RMX3201)
• Motorola Moto G8 Power Lite (XT2055-4)

Once VoLTE is activated, iPhone customers will continue to see the 4G icon display on your handset.

Compatible android handset customers will see VoLTE next to the 4G icon in the phone screen when in a VoLTE coverage area. During a 4G voice call, you will also see an HD icon on the calling screen.

VoLTE calls will be charged in exactly the same way as 3G voice calls. There are no additional charges for making calls on the 4G network.

VoLTE roaming will soon be available in VoLTE coverage areas of the US, with an international rollout planned.

LTE (Long Term Evolution) is the 'fourth generation' of mobile technology used to provide 4G services. The Optus 4G Plus network uses three types of LTE technology, FD-LTE, TD-LTE and LTE-A.

FD-LTE (Frequency Division Long Term Evolution)

FD LTE is a type of 4G technology used by the Optus 4G Plus network. FD-LTE technology uses two separate frequency channels (one channel for data download and one channel for data upload).

• TD-LTE (Time Division Long Term Evolution)

TD LTE is a type of 4G technology used by the Optus 4G Plus network. The upload and download of data occur on the same frequency bands but at different times.

• LTE-A (Long Term Evolution Advanced)

LTE-A is the next generation of 4G technology used by the Optus 4G Plus network. LTE-A improves your 4G experience by bringing new features like carrier aggregation.

Put simply, carrier aggregation improves network speeds by combining a number of frequency bands to make the ‘network pipe bigger’. This means you can go even faster on the Optus 4G Plus network.

LTE Advanced won’t kick in all the time as the Optus 4G Plus network is already super fast, instead LTE Advanced will give an extra speed boost when downloading very large files or HD videos.

Carrier aggregation (2x channel) on the Optus 4G Plus network requires a compatible category 6 device. This technology uses several combinations of 4G spectrum bands,

• Selected capital cities: We combine our 2300MHz spectrum
• Some capital cities / major metropolitan areas: We also use 700MHz & 1800MHz
• Major regional town centres: We use 700 MHz & 2600MHz
  

Carrier aggregation (3x channel) on the Optus 4G Plus network is available in selected parts of Newcastle / Melbourne CBD and requires a compatible category 9 device. This technology uses a unique combination of,

• 20+20MHz of 2300 MHz
• 15MHz of 1800 MHz spectrum

The main differences between 3G and 4G are

SPEED

• 4G is quicker than 3G
• 4G has less buffering, better video quality, enhanced gaming experience and improved streaming services

FREQUENCIES

• The Optus 4G Plus network uses the LTE 700Mhz, 1800Mhz, 2100Mhz, 2300MHz & 2600Mhz frequency bands
• The Optus 3G network uses the 900MHz frequency band