Reachability *reachability = [Reachability reachabilityForInternetConnection]; // in this line it doesn't recognize "Reachability"
[reachability startNotifier];

NetworkStatus status = [reachability currentReachabilityStatus]; // In this line it doesn't recognize "NetworkStatus"

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