Siemens MC55 AT manual Factory defined SIM locks

	<password>: User defined password. It is needed before the first use of
	<facility> "PS" and, therefore, must first be specified with AT+CPWD or
	AT^SPWD, if it has not been predefined by factory settings. If set by factory (e.g.
	for a prepaid mobile), the password is supplied by the provider or operator.
"FD"	SIM fixed dialling memory: If the mobile is locked to "FD", only the phone num-
	bers stored to the "FD" memory can be dialled. (Capacity of FD phonebook
	depending on the SIM card).
	<password>: SIM PIN 2.
	If a lock on the SIM fixed dialing memory is active, the following applies:
	• Outgoing voice, data or fax calls can be made only to numbers stored in
	''FD'' phonebook.
	Result code depends on the type of the call:
	for voice calls, indication is ''+CME Error 257: Call barred''.
	for data and fax calls, indication is ''NO CARRIER''.
	• Access to defined Supplementary Services such as Call barring, Call wait-
	ing, Call forwarding, Call hold and Multiparty is possible only if the exact cor-
	responding public MMI *# code for the desired service is stored in the fixed
	dialing number phone book, and used with ATD.
	AT commands for supplementary service control are barred while "FD" lock
	is active.
	Indication is ''+CME Error 257: Call barred''.
	• Access to Unstructured Supplementary Services (''USSD'') is possible only
	if the exact desired USSD string is stored in the fixed dialling number phone
	book, and used with ATD.
	AT commands for USSD are barred while "FD" lock is active.
	Indication is ''+CME Error 257: Call barred''.
	• SMS can be sent only to phone numbers which are stored in the ''fixed dial-
	ling numbers'' phonebook ''FD''.
	Indication is ''+CMS Error 302: operation not allowed''.
	• GPRS commands can be used only if the ''fixed dialling numbers'' phone-
	book ''FD'' contains an entry with phone number ''*99#''. This single entry
	enables all GPRS commands, including AT commands and modem com-
	patibility commands like ''ATD*99***1#'' or ''ATD*98***1#''.
	Indication is ''+CME Error 257: Call barred''.

Factory defined SIM locks:

Typical examples of factory set SIM locks are prepaid phones or network locks, used to restrict the operation of a mobile to a specific provider or operator. The client should be aware that each of these lock types can only be unlocked if the associated password is available. For example, a mobile can be locked to accept only SIM cards from the respective provider, or even one single SIM card. Once a different SIM card is inserted the ME will prompt the client to enter a specific code. This is not the PUK of the SIM card, but usually an 8-digit code which needs to be requested from the provider.

The locks can only be set by the manufacturer and need to be agreed upon between the parties concerned, e.g. provider, operator, distributor etc. on the one side and the manufacturer on the other side. For details contact your local dealer or Siemens AG.

Parameter <class> is not applicable to SIM locks.

<password> and instructions for unlocking must be obtained from the network provider.

"PF"	lock Phone to the very First SIM card
"PN"	Network Personalisation
"PU"	Network subset Personalisation
"PP"	Service Provider Personalisation
"PC"	Corporate Personalisation

MC55_ATC_V04.00	Page 110 of 475	3/17/06
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