Java tutorial
//package com.java2s; //License from project: Open Source License import android.content.Context; import android.telephony.TelephonyManager; public class Main { public static boolean isTelephonyEnabled(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(context.TELEPHONY_SERVICE); return tm != null && tm.getSimState() == TelephonyManager.SIM_STATE_READY; } }