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    12 <task xml:lang="en" id="GUID-6D1DEAA7-59BB-5A5B-9E5F-8383E017F8C0"><title>Caller Identity Services Tutorial</title><shortdesc>This tutorial describes how to implement the caller identity services in a Symbian OS device. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody> <context><p>GSM defines the following supplementary services that display the identity of the calling or the connected party: </p> <ul><li id="GUID-B8EE79F8-E4AA-5994-959B-0C003EC9FBF4"><p>Calling Line Identity Presentation (CLIP) </p> </li> <li id="GUID-16A072AE-C8BA-5403-A610-F699F013C6CA"><p>Calling Line Identity Restriction (CLIR) </p> </li> <li id="GUID-4979062D-DC26-5C9F-8251-69EC1B33AD1E"><p>Connected Line Identity Presentation (COLP) </p> </li> <li id="GUID-AA2417DE-3B39-5033-9E8A-4B09CBB57B7C"><p>Connected Line Identity Restriction (COLR) </p> </li> <li id="GUID-2314174B-21A4-5AEF-B2F7-2B453437B626"><p>Calling Name Presentation (CNAP) </p> </li> </ul> </context> <steps-unordered> <step id="GUID-DEF97BFA-EAFC-535C-A305-A435F6825501"><cmd>To get the status of an identity service, use <xref href="GUID-AA81AFA4-6FAC-3B0D-A082-BE0AEC58CCA8.dita"><apiname>RMobilePhone::GetIdentityServiceStatus()</apiname></xref>  </cmd> </step> <step id="GUID-8C661856-AFA5-5FB9-8725-140139C92A95"><cmd/><info>Possible services are described in the <xref href="GUID-AA81AFA4-6FAC-3B0D-A082-BE0AEC58CCA8.dita"><apiname>RMobilePhone::TMobilePhoneIdService</apiname></xref> enum and the status values in <xref href="GUID-AA81AFA4-6FAC-3B0D-A082-BE0AEC58CCA8.dita"><apiname>RMobilePhone::TMobilePhoneIdServiceStatus</apiname></xref>. </info> </step> </steps-unordered> <example><title>Caller identity example</title> <p>The following code checks if the CNAP service is active that is if the name of the caller is shown. </p> <p>The code assumes <codeph>iMobilePhone</codeph> is an <xref href="GUID-AA81AFA4-6FAC-3B0D-A082-BE0AEC58CCA8.dita"><apiname>RMobilePhone</apiname></xref> object. </p> <codeblock id="GUID-E125D1CE-5491-5408-852D-DB7583EA3FCD" xml:space="preserve">TRequestStatus status;

    13 RMobilePhone::TMobilePhoneIdServiceStatus serviceStatus;

    14 

    15 iMobilePhone.GetIdentityServiceStatus(status,RMobilePhone::EIdServiceCallerName, serviceStatus);

    16 User::WaitForRequest(status);

    17 User::LeaveIfError(status.Int());

    18 

    19 if (serviceStatus == RMobilePhone::EIdServiceActivePermanent)

    20     {

    21         //do something

    22     }

    23 </codeblock> </example> <postreq><p>There are no setter functions for the above described supplementary services. Contact the service provider to change the service activation. </p> </postreq> </taskbody></task>