Question: In which state does the Mobile Station enter the PLMN SEARCH state after a SIM/USIM is inserted?
Option 1: NO IMSI
Option 2: NORMAL SERVICE
Option 3: RECEIVING GROUP CALL (NORMAL SERVICE)
Option 4: ATTEMPTING TO UPDATE
Explanation: According to the specification, when a SIM/USIM is inserted in state NO IMSI, the Mobile Station enters the PLMN SEARCH state. This is because the insertion of a SIM/USIM triggers a search for available Public Land Mobile Networks (PLMNs).