Cleanup iOS version for phone service status & document.

ios/Classes/strategies/PhonePermissionStrategy.m

@@ -36,22 +36,16 @@
      * Returns YES if the device can place a phone call
      * Returns YES if the device can place a phone call
      */
      */
 
 
-    // Check if the device can place a phone call
-    if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"tel://"]]) {
-        // Device supports phone calls, lets confirm it can place one right now
-        CTTelephonyNetworkInfo *netInfo = [[CTTelephonyNetworkInfo alloc] init];
-        CTCarrier *carrier = [netInfo subscriberCellularProvider];
-        NSString *mnc = [carrier mobileNetworkCode];
-        if (([mnc length] == 0) || ([mnc isEqualToString:@"65535"])) {
-            // Device cannot place a call at this time.  SIM might be removed.
-            return NO;
-        } else {
-            // Device can place a phone call
-            return YES;
-        }
+    // Device supports phone calls, lets confirm it can place one right now
+    CTTelephonyNetworkInfo *netInfo = [[CTTelephonyNetworkInfo alloc] init];
+    CTCarrier *carrier = [netInfo subscriberCellularProvider];
+    NSString *mnc = [carrier mobileNetworkCode];
+    if (([mnc length] == 0) || ([mnc isEqualToString:@"65535"])) {
+        // Device cannot place a call at this time.  SIM might be removed.
+        return NO;
     } else {
     } else {
-        // Device does not support phone calls
-        return  NO;
+        // Device can place a phone call
+        return YES;
     }
     }
 }
 }
 
 

lib/src/permission_handler.dart

@@ -42,13 +42,20 @@ class PermissionHandler {
   /// Returns a [Future] containing the current service status for the supplied [PermissionGroup].
   /// Returns a [Future] containing the current service status for the supplied [PermissionGroup].
   ///
   ///
   /// Notes about specific PermissionGroups:
   /// Notes about specific PermissionGroups:
-  /// - **PermissionGroup.phone** on Android:
-  ///   - The method will return [ServiceStatus.notApplicable] when:
-  ///     1. the device lacks the TELEPHONY feature
-  ///     1. TelephonyManager.getPhoneType() returns PHONE_TYPE_NONE
-  ///     1. when no Intents can be resolved to handle the `tel:` scheme
-  ///   - The method will return [ServiceStatus.disabled] when:
-  ///     1. the SIM card is missing
+  /// - **PermissionGroup.phone**
+  ///   - Android:
+  ///     - The method will return [ServiceStatus.notApplicable] when:
+  ///       1. the device lacks the TELEPHONY feature
+  ///       1. TelephonyManager.getPhoneType() returns PHONE_TYPE_NONE
+  ///       1. when no Intents can be resolved to handle the `tel:` scheme
+  ///     - The method will return [ServiceStatus.disabled] when:
+  ///       1. the SIM card is missing
+  ///   - iOS:
+  ///     - The method will return [ServiceStatus.notApplicable] when:
+  ///       1. the native code can not find a handler for the `tel:` scheme
+  ///     - The method will return [ServiceStatus.disabled] when:
+  ///       1. the mobile network code (MNC) is either 0 or 65535. See
+  ///          https://stackoverflow.com/a/11595365 for details
   ///   - **PLEASE NOTE that this is still not a perfect indication** of the
   ///   - **PLEASE NOTE that this is still not a perfect indication** of the
   ///     devices' capability to place & connect phone calls
   ///     devices' capability to place & connect phone calls
   ///     as it also depends on the network condition.
   ///     as it also depends on the network condition.