Java tutorial
//package com.java2s; import android.content.Context; import android.telephony.TelephonyManager; public class Main { public static String getIMSI(Context context) { String result = ""; try { TelephonyManager telManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); result = telManager.getSubscriberId(); } catch (Exception ex) { ex.printStackTrace(); } return result; } }