Section: 5.4.4 Identification procedure 5.4.4.1 General
Content: The identification procedure is used by the network to request a particular UE to provide specific identification parameters, e.g. the International Mobile Subscriber Identity (IMSI) or the International Mobile Equipment Identity (IMEI). IMEI and IMSI definition and structure are specified in 3GPP TS 23.003[ Numbering, addressing and identification ]  [2]. For mobile device supporting both 3GPP access and cdma2000® access a single IMEI is used to identify the device as specified in 3GPP TS 22.278[ Service requirements for the Evolved Packet System (EPS) ]  [1C]. If the UE is a MUSIM UE, the UE uses a separate IMEI for each USIM the UE operates.