While the Wi-Fi calling feature on iPhone helps in saving data by making use of your free Home or Office Wi-Fi network to make calls, there are reasons as to why you may want to disable this feature.
For example, Wi-Fi calling can have an adverse impact on call quality, due its default tendency to connect to every available network. This is especially true, if you are traveling, commuting or walking.
Similarly, the tendency of a Wi-Fi calling to constantly scan for available Wi-Fi networks can lead to loss of battery life and even network connectivity issues on your iPhone.
1. Disable Wi-Fi Calling on iPhone
If Wi-Fi calling is creating problems or if you are not using it, you can disable Wi-Fi Calling at any time on your iPhone by following the steps below.
1. Go to Settings > Phone > Wi-Fi Calling.
2. On the next screen, move the toggle next to Wi-Fi Calling to OFF Position.
Note: You can also disable Wi-Fi calling by going to Settings > Cellular > on the next screen, move the toggle next Wi-Fi calling to OFF position.
2. Enable Wi-Fi Calling on iPhone
If your iPhone is indicating poor network connectivity, you can manually enable Wi-Fi Calling at any time on your iPhone.
1. Go to Settings > Cellular > Wi-Fi Calling.
2. On the next screen, move the toggle next to Wi-Fi Calling to ON Position.
3. On the confirmation pop-up, tap on the Enable option to confirm.
Note: If you are on a Limited Data Plan, you might be interested in taking a look at this guide: How to Reduce Cellular Data Usage on iPhone.