Java tutorial
//package com.java2s; import android.content.Context; import android.telephony.TelephonyManager; public class Main { public static boolean isSIMPresent(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); if (tm.getSimState() == TelephonyManager.SIM_STATE_ABSENT) { return false; } else return true; } }