How can i find programmatically iPhone device connected 3G network or Wifi in iOS7

Hi i need to find out whether iPhone internet connected 3G or 2G or WIFI network any suggestions

Thanks

Sravan

Download Reachability Class for iOS from this link:- https://github.com/tonymillion/Reachability

1)Add Reachability.h &.m in your Project, make sure you make it ARC compatible by adding flag -fno-objc-arc

2)Now, check the connection type in your view controller

  Reachability *reachability = [Reachability reachabilityForInternetConnection];
    [reachability startNotifier];

    NetworkStatus status = [reachability currentReachabilityStatus];

    if(status == NotReachable) 
    {
        //No internet
    }
    else if (status == ReachableViaWiFi)
    {
        //WiFi
    }
    else if (status == ReachableViaWWAN) 
    {
        //3G
    }