Question: What is the minimum frequency at which a UE (User Equipment) must re-confirm the BSIC (Base Station Identity Code) of a GSM cell after initial identification, to consider it "verified"?
Option 1: Every 30 seconds
Option 2: Every 10 seconds for the 6 strongest GSM carriers
Option 3: At least once every 3 times Tre-confirm abort seconds
Option 4: At least once every 6 times Tre-confirm abort seconds
Explanation: To maintain a "verified" status for a GSM cell's BSIC, the UE must re-confirm the BSIC at regular intervals. According to the specifications, this re-confirmation is required at least once every 6 times Tre-confirm abort seconds after the initial identification. This ensures continuous validation of the cell's identity, crucial for reliable network operation and handovers. [Note: Tre-confirm abort refers to a time interval specified in the standards, related to the re-confirmation process.]