Question: In a USIM's EFOPL (Operator PLMN List) file, how are multiple LAC/TAC values specified for a given PLMN to indicate a range?
Option 1: By storing the start of the range in bytes 4-5 and the end in bytes 6-7 with an offset value.
Option 2: By setting bytes 4-5 to '0000' and bytes 6-7 to 'FFFE' for the entire range, or mirroring a single value across both byte sets for a specific LAC/TAC.
Option 3: Through a separate EF dedicated to LAC/TAC ranges, referenced by an index in EFOPL.
Option 4: By utilizing an additional bit in each byte to signify the start and end of the range.
Explanation: According to USIM specifications for EFOPL, a range of LAC/TAC values for a given PLMN is indicated by either setting bytes 4-5 to '0000' and bytes 6-7 to 'FFFE' for the entire range, or duplicating a single LAC/TAC value across both byte sets for one specific value. This allows flexible handling of Location Area or Tracking Area identities with PLMN network names.