Depending on the device you use, there are different ways to turn on Wi-Fi calling.
If you have an Android phone, you can turn on Wi-Fi calling by going into your phone app and pressing the 'more' button, or the 3 dots in the top right. From there, go to settings.
Depending on what version of Android you have, from here you'll either need to tap calls and then Wi-Fi calling, or you may be able to tap a switch to turn on Wi-Fi calling directly after hitting settings.
The following are some of the Android devices that support Wi-Fi calling in Australia on the 3 major networks:
Other Android phones by Oppo, LG, Huawei, HTC, Motorola and more might also be supported depending on your provider, so check directly with them.
To turn on Wi-Fi calling on your iPhone, go to Settings > Phone > Wi-Fi Calling.
If Wi-Fi calling is available, you'll see "Wi-Fi" in the status bar while viewing the Control Centre. Then your calls will use Wi-Fi calling.
The following Apple devices allow Wi-Fi calling in Australia via the 3 main telcos:
No, Wi-Fi calling won't cost you any money as providers don't charge additional fees for using the feature.
If you're on a pay-as-you-go plan, charges may apply or it may not be available and only available on post paid plans, so you will need to check with the carrier your with. Most other plans include unlimited national calls and texts, so this usually isn't a concern.
If you're in a mobile blackspot or there's an outage from your telco's end, then Wi-Fi calling is useful as long as you have a strong internet connection.