To set up Wi-Fi calling, first enable it in the Device Settings tab of your Ting account. After that, follow the steps below to turn it on your phone.
Your iPhone needs to be an iPhone 6s or newer and have iOS 14.0 or higher to use Wi-Fi calling.
Open Settings and tap Phone.
Enter an E-911 address and select Update.
The network in the upper left will change to Ting Wi-Fi when you're connected to Wi-Fi calling.