11 3G/GSM interworking

21.1113GPPRelease 17TSUSIM and IC card requirements

11.1 Void

11.2 3G subscribers in a GSM network

3GPP TS 22.101 [2] requires that UMTS shall provide some mechanisms which permit UMTS subscribers to roam easily onto pre-UMTS systems and access the services.

Thus, the specification shall allow the UICC to be used with a dual mode (GSM/ 3G) ME and a GSM ME for the provision of GSM service.