Java tutorial
//package com.java2s; import android.content.Context; import android.database.Cursor; import android.net.Uri; public class Main { private static Uri PREFERRED_APN_URI = Uri.parse("content://telephony/carriers/preferapn"); public static final String APN_PROP_PORT = "port"; public static int getApnPortInt(Context context) { Cursor c = context.getContentResolver().query(PREFERRED_APN_URI, null, null, null, null); c.moveToFirst(); if (c.isAfterLast()) { c.close(); return -1; } int result = c.getInt(c.getColumnIndex(APN_PROP_PORT)); return result; } }