LocationUtils.java

package common.android.fiot.androidcommon;

import android.content.Context;
import android.telephony.TelephonyManager;

import java.util.Locale;

/**
 * Created by caoxuanphong on    7/28/16.
 */
public class LocationUtils {

    public static String getUserCountry(Context context) {
        try {
            final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            final String simCountry = tm.getSimCountryIso();
            if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
                return simCountry.toLowerCase(Locale.US);
            }  else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
                String networkCountry = tm.getNetworkCountryIso();
                if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
                    return networkCountry.toLowerCase(Locale.US);
                }
            }
        }
        catch (Exception e) { }
        return null;
    }
}