Question: Under what condition may a Mobile Equipment (ME) suspend the Universal Integrated Circuit Card (UICC) after entering Power Saving Mode (PSM), and what is the prerequisite for leaving PSM in this scenario?
Option 1: The UICC does not support the UICC suspension mechanism, and the ME can leave PSM without resuming the UICC.
Option 2: The UICC supports the UICC suspension mechanism (SUSPEND UICC command), and the ME must successfully resume the UICC before it can leave PSM.
Option 3: The ME always suspends the UICC in PSM, regardless of UICC capabilities, and can leave PSM without resuming the UICC.
Option 4: The UICC's support for the suspension mechanism is irrelevant; the ME decides independently whether to suspend or resume the UICC in PSM.
Explanation: This requires understanding of Power Saving Mode (PSM) and its interaction with the Universal Integrated Circuit Card (UICC) suspension mechanism. The correct answer highlights that for an ME to suspend the UICC after entering PSM, the UICC must support the suspension mechanism. Moreover, successful resumption of the UICC is a prerequisite for the ME to exit PSM, ensuring seamless service restoration.