Android App crashes on 4G internet connection but works fine on GSM mode Only

Question

I have created an android application which user Http Post and Get calls to read and write data from web server. Nothing too flashy also. My phone/SIM has 4G. Every time the app tries to connect, thing go slow and most of the time the app crashes. So I changed settings to GSM only. Guess what? The app works much better. What could be the possible reasons for it?

Answer 1

Use the following method in order to detect all available type of networks at your client's disposal :

public static boolean checkNetworkRechability(Context context) {
        Boolean bNetwork = false;
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        for (NetworkInfo networkInfo : connectivityManager.getAllNetworkInfo()) {
            int netType = networkInfo.getType();
            int netSubType = networkInfo.getSubtype();

            if (netType == ConnectivityManager.TYPE_WIFI) {
                bNetwork = networkInfo.isConnected();
                if (bNetwork == true)
                    break;
            } else if (netType == ConnectivityManager.TYPE_MOBILE && netSubType != TelephonyManager.NETWORK_TYPE_UNKNOWN) {
                bNetwork = networkInfo.isConnected();
                if (bNetwork == true)
                    break;
            } else {
                bNetwork = false;
            }
        }
        if (!bNetwork) {
            Log.i(TAG, "You are not in network");
        }
        Log.i(TAG, "bNetwork : " + bNetwork);
        return bNetwork;
    }