Question: In a UICC with multiple USIM applications, what is possible when selecting a non-IMSI based USIM alongside an IMSI based USIM?
Option 1: The selection of a non-IMSI based USIM will always override the IMSI based USIM.
Option 2: The UICC must exclusively select either a non-IMSI or an IMSI based USIM at any given time.
Option 3: A non-IMSI based USIM can be selected in parallel with an IMSI based USIM, allowing for concurrent configurations.
Option 4: The presence of multiple USIM applications automatically defaults to the selection of an IMSI based USIM.
Explanation: This is correct because, as per the application selection procedure in the context of UICC configurations, having multiple USIM applications with different SUPI (Subscriber Permanent Identifier) types (e.g., at least one IMSI-based and one non-IMSI based USIM) enables the parallel selection of both a non-IMSI based USIM and an IMSI based USIM. This allows for flexibility in handling different types of subscriber identities simultaneously, which is beneficial for various telecom service scenarios, especially in evolving 5G and IoT contexts where diverse identity management needs arise.