how do you get the phone's MCC and MNC in Android?

The TelephonyManager has a method to return the MCC+MNC as a String (getNetworkOperator()) which will do you what you want. You can get access it via:

protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    TelephonyManager tel = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);    String networkOperator = tel.getNetworkOperator();    if (!TextUtils.isEmpty(networkOperator)) {        int mcc = Integer.parseInt(networkOperator.substring(0, 3));        int mnc = Integer.parseInt(networkOperator.substring(3));    }}

You do know there are two MCC/MNC's for an active phone? (One is the country code and carrier id for the Sim card, the other is for the network/cell tower in use.)

If the getResources().getConfiguration().mcc is not empty in airplane mode, it's the Sim value TelephonyManager.getSimOperator(), not the tower value TelephonyManager.getNetworkOperator().

I don't know which the OP wants, but Answer 3 will give him different results than his original code if the getConfiguration is really the Sim values.

getResources().getConfiguration().mcc is a bad choice because it returns an integer, hence compromising valid values such as 01, or 044. Clearly integer is not a good option for this.

See details in Mobile_Network_Code

Update: in Australia, we verified a wrong case here. The getNetworkOperator returns different value from getSimOperator, where the latter is correct.

See details in Android doc: TelephonyManager