Java tutorial
//package com.java2s; //License from project: Open Source License public class Main { public static String getMNC(String IMSI) { String IMSIsub = IMSI.substring(3, 5); if (IMSIsub.equals("01")) { return "CHINA_UNICOM"; } else if (IMSIsub.equals("00")) { return "CHINA_MOBILE"; } else if (IMSIsub.equals("03")) { return "CHINA_TELECOM"; } else { return null; } } }