Question: In an NB-IoT conformance testing scenario with a single cell and default parameters, under ideal radio conditions, what is the expected state of the User Equipment (UE) at the start of the procedure when `px_DoAttachWithoutPDN` is set to `TRUE`?
Option 1: RRC-IDLE, awaiting initial attach
Option 2: RRC-INACTIVE, with an existing PDN connection
Option 3: ECM-CONNECTED but not yet RRC-CONNECTED
Option 4: RRC-CONNECTED, ready for procedure initiation
Explanation: According to the provided conditions, the User Equipment (UE) is specified to be in the RRC-CONNECTED state at the beginning of the procedure. This state indicates that the UE has already established a connection with the network and is ready for data transfer or other procedures, aligning with the scenario's initial conditions. The `px_DoAttachWithoutPDN=TRUE` setting implies a specific configuration for the attach process but does not alter the required initial state of RRC-CONNECTED for this context.