UIDevice subclass for fetching real carrier display name – may differ from regular -carrierName for virtual operators etc.

UIDevice+cellularCarrierDisplayedName.m

@implementation UIDevice (Utils)

- (NSString *)cellularCarrierName
{
	return [[[[CTTelephonyNetworkInfo alloc] init] subscriberCellularProvider] carrierName];
}

- (NSString *)cellularCarrierDisplayedName
{
	static NSString *displayedName = nil;
	static NSDate *lastUpdate = nil;

	// Perform an update every hour
	if (!lastUpdate || -[lastUpdate timeIntervalSinceNow] > 60*60)
	{
		UIView *bar = nil;
		SEL sel = NSSelectorFromString([ @[ @"status", @"Bar" ] componentsJoinedByString:@""]);

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
		if ([[UIApplication sharedApplication] respondsToSelector:sel])
			bar = [[UIApplication sharedApplication] performSelector:sel];
#pragma clang diagnostic pop

		bar = [bar viewForClass:NSClassFromString(
			[ @[ @"UI", @"Status", @"BarService", @"ItemView" ] componentsJoinedByString:@""])];

		displayedName = [bar valueForKey:@"_serviceString"] ?:
		                [self cellularCarrierName];
	}

	return displayedName;
}

@end