Wi-Fi Calling is a feature available on some iPhone models, with some cellular providers. It allows your iPhone to make calls over a Wi-Fi connection instead of only using a cellular network. This can often result in a better call quality, and domestic Wi-Fi calls to your home country are often free, even if you are currently in a different country.
If you have gone to enable Wi-Fi calling on your iPhone 7, you may have noticed a setting called “Prefer Wi-Fi When Roaming.” You can enable this setting to let your iPhone know that you would prefer to place calls over Wi-Fi when you are roaming, which can potentially reduce the amount of minutes, and therefore charges, that you incur while you are travelling internationally with your iPhone.
Prefer to Use Wi-Fi Instead of Cellular When Roaming With Your iPhone 7
The steps in this article were written using an iPhone 7 Plus, in iOS 10. Once you have enabled this setting, your iPhone will prefer to make calls over Wi-Fi instead of a cellular network. If you would prefer not to allow calls over cellular when roaming at all, then you can change that setting at Settings > Cellular > Cellular Data Options > Roaming. You can read this article for more information on iPhone roaming settings.
Note that not all cellular carriers allow Wi-Fi calling. If your carrier does not, then you may not see this option.
Step 1: Open the Settings menu.
Step 2: Scroll down and select the Phone option.
Step 3: Tap the Wi-Fi Calling button.
Step 4: Tap the button to the right of Prefer Wi-Fi While Roaming. If you would also like to enable Wi-Fi calling on your device, then tap the button to the right of Wi-Fi Calling on This iPhone, then complete the steps to set up an emergency address. You can learn more about Wi-Fi Calling here.
Learn about some good ways to reduce cellular data usage on your iPhone if you are finding it to be a concern more often than not.
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