public void fetch_status(){       TelephonyManager tm = (TelephonyManager) this       .getSystemService(Context.TELEPHONY_SERVICE);//           String str = "";       str += "DeviceId(IMEI) = " + tm.getDeviceId() + "\n";        str += "DeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion() + "\n";        str += "Line1Number = " + tm.getLine1Number() + "\n";        str += "NetworkCountryIso = " + tm.getNetworkCountryIso() + "\n";        str += "NetworkOperator = " + tm.getNetworkOperator() + "\n";        str += "NetworkOperatorName = " + tm.getNetworkOperatorName() + "\n";        str += "NetworkType = " + tm.getNetworkType() + "\n";        str += "PhoneType = " + tm.getPhoneType() + "\n";        str += "SimCountryIso = " + tm.getSimCountryIso() + "\n";        str += "SimOperator = " + tm.getSimOperator() + "\n";        str += "SimOperatorName = " + tm.getSimOperatorName() + "\n";        str += "SimSerialNumber = " + tm.getSimSerialNumber() + "\n";        str += "SimState = " + tm.getSimState() + "\n";        str += "SubscriberId(IMSI) = " + tm.getSubscriberId() + "\n";        str += "VoiceMailNumber = " + tm.getVoiceMailNumber() + "\n";        TextView sys = (TextView) findViewById(R.id.sys);       sys.setText(str);   }