Maybe. Depends on what you are asking. If you havent signed up with a carrier, i dont think you can enable wifi calling. But if you have no cell tower connection and youve previously set up wifi calling, it looks like you can still make emergency calls:
“Emergency calls on your iPhone are routed through cellular service when available. In the event that cellular service isn’t available, and you have enabled Wi-Fi Calling, emergency calls may be made over Wi-Fi, and your device’s location information may be used for emergency calls to aid response efforts, regardless of whether you enable Location Services. Some carriers may use the address you registered with the carrier when signing up for Wi-Fi Calling as your location. When connected to Wi-Fi calling, your iPhone may not receive emergency alerts.”
Is that true for wifi calling too?
Maybe. Depends on what you are asking. If you havent signed up with a carrier, i dont think you can enable wifi calling. But if you have no cell tower connection and youve previously set up wifi calling, it looks like you can still make emergency calls:
“Emergency calls on your iPhone are routed through cellular service when available. In the event that cellular service isn’t available, and you have enabled Wi-Fi Calling, emergency calls may be made over Wi-Fi, and your device’s location information may be used for emergency calls to aid response efforts, regardless of whether you enable Location Services. Some carriers may use the address you registered with the carrier when signing up for Wi-Fi Calling as your location. When connected to Wi-Fi calling, your iPhone may not receive emergency alerts.”
https://support.apple.com/en-is/guide/iphone/iph78f4697ca/ios