diff --git a/MobileLibrary/iOS/PsiphonTunnel/PsiphonTunnel/PsiphonTunnel.m b/MobileLibrary/iOS/PsiphonTunnel/PsiphonTunnel/PsiphonTunnel.m
index b90bd11fe..cab0b6d2b 100644
--- a/MobileLibrary/iOS/PsiphonTunnel/PsiphonTunnel/PsiphonTunnel.m
+++ b/MobileLibrary/iOS/PsiphonTunnel/PsiphonTunnel/PsiphonTunnel.m
@@ -1579,7 +1579,7 @@ + (NSString * _Nonnull)getDeviceRegion {
         // CTCarrier deprecated with no replacement as of iOS 16 so there is no alternative API to
         // get the carrier country code; [CTCarrier isoCountryCode] returns @"--" on iOS >=16.
         
-        return [[[CNContactsUserDefaults sharedDefaults] countryCode] capitalizedString];
+        return [[[CNContactsUserDefaults sharedDefaults] countryCode] uppercaseString];
         
     } else {
         CTTelephonyNetworkInfo *networkInfo = nil;