Java tutorial
//package com.java2s; import android.content.Context; import android.telephony.TelephonyManager; public class Main { /** * * @param context * @return bool, true se c'e il modulo telefonico oppure se la sim e attiva */ public static boolean isTelephonyEnabled(Context context) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); return tm != null && tm.getSimState() == TelephonyManager.SIM_STATE_READY; } }