Java tutorial
//package com.java2s; import android.content.Context; import android.telephony.TelephonyManager; public class Main { public static String getIMSI(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); String imsi = tm.getSubscriberId(); if (imsi == null) imsi = ""; return imsi; } }