How to detect carrier is available or not in iphone?

Question

I have done most of all the things to get my phone carrier availability. I got signal strength by using CTGetSignalStrength() and SIM status by CTSIMSupportGetSIMStatus(); .

But it always returns kCTSIMSupportSIMStatusReady . Now if lost my network connection then it also returns same status as kCTSIMSupportSIMStatusReady .

So, is there any method to get notify for lost of any signal in iphone? My app doesn't require internet connections.

Answer 1

You can always use Reachability (included in AFNetworking)

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

NetworkStatus status = [reachability currentReachabilityStatus];

if(status == NotReachable) 
{
    // in this case there is no internet connection
}
else if (status == ReachableViaWiFi)
{
    // in this case there is WiFi connection
}
else if (status == ReachableViaWWAN) 
{
    // in this case there 3G connection, WCDMA-umts
}

Do you need to check the difference between WCDMA-UMTS, GPRS, GSM?