Measuring cellular signal strength

Get signalStreght IOS9:

UIApplication *app = [UIApplication sharedApplication];  
NSArray *subviews = [[[app valueForKey:@"statusBar"]     valueForKey:@"foregroundView"] subviews];  
NSString *dataNetworkItemView = nil;  
     for (id subview in subviews) {  
   if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarSignalStrengthItemView") class]])  
   {  
        dataNetworkItemView = subview;  
        break;  
    }  
 }  
int signalStrength = [[dataNetworkItemView valueForKey:@"signalStrengthRaw"] intValue];  
NSLog(@"signal %d", signalStrength);