So true. I guess I'm growing old. Since the datastore only provides actual phone numbers, I had not thought of a VoIP app. So for a more general case than mine, you're spot on. I have now filed a Suggestion to make canOpenURL smarter. That would be a good spot for getting my way of using CTCarrier covered in a future iOS. Bug/suggestion number FB11678610 .

Hi, I have the same question, looking for a replacement for CTCarrier. I am using mobileNetworkCode as a way to see if the iDevice can actually perform a call at this moment, since an iPhone could also be used without a SIM-card installed. I am using code that I picked up as a gist on Github, see below (part of a SwiftUI View). If you would have another way to check call capability without using CTCarrier, I would be much obliged.                   Button (action: {                         // check if device can perform phone call                         // https://gist.github.com/krin-san/8f34206bc0e7c9fddcc9                         var isCapableToCall: Bool = false                         guard let url = URL(string: "tel:"+item.telephone) else {return}                         if UIApplication.shared.canOpenURL(url) {                             // Check if iOS Device supports phone calls                             // User will get an alert error when they will try to make a phone call in airplane mode                             if let subscribers = CTTelephonyNetworkInfo().serviceSubscriberCellularProviders {                                 for key in subscribers.keys {                                     if ((subscribers[key]?.mobileNetworkCode?.isEmpty) == nil) {                                         isCapableToCall = true                                         break                                     }                                 }                             } else {                                 // Device cannot place a call at this time. SIM might be removed                                 isCapableToCall = false                             }                         } else {                             // iOS Device is not capable for making calls                             isCapableToCall = false                         }                         if isCapableToCall {                                 UIApplication.shared.open(url)                         } else {                             // if device cannot call, show a dialog with the phone number                             showPhoneNumber.toggle()                         }                     }, label: {                         VStack {                             Image(systemName: "phone").font(.system(.title2))                             Text(LocalizedStringKey("Call"))                                 .font(.caption2)                                 .padding(1)                         }                         .frame(width: 50, height: 45)                     })