Question: In a 3GPP-conformant test environment for User Equipment (UE), as specified for Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC), what is the required state of the UE during initial conditions for conformance testing, assuming no override by a specific test case?
Option 1: Connected Mode, with an established dedicated bearer (State 3)
Option 2: Registered, Idle Mode state (equivalent to State 2 or 2-CE)
Option 3: Detached State, awaiting initial registration
Option 4: In Service, with ongoing voice call activity
Explanation: For conformance testing as outlined in the context of E-UTRA and EPC for UE, the device needs to be in a baseline state that allows for the broadest range of test scenarios without preconditions that could influence test outcomes. The Registered, Idle Mode (State 2 or 2-CE) ensures the UE is recognized by the network but not actively engaged in resource-intensive activities, providing a clean slate for testing various functionalities without initial biases. This state facilitates comprehensive evaluation of the UE's behavior under different stimuli as defined by the test cases.