Question: When a Barred Dialling Number (BDN) with wild characters is stored in the SIM/USIM, how are these wild characters treated during comparison with a dialled number?
Option 1: Wild characters are ignored in the comparison process.
Option 2: Each wild character is replaced by any single digit for a successful match.
Option 3: The presence of a wild character in the BDN automatically bars the call regardless of the dialled number.
Option 4: Wild characters can only be matched with identical wild characters in the dialled number.
Explanation: According to the specified behavior for Barred Dialling Numbers, when a BDN contains one or more wild characters, each of these wild characters is treated as a placeholder that can be replaced by any single digit during the comparison process with the dialled number. This allows for flexible matching and effectively bars calls to numbers that match the pattern defined by the BDN, even if the exact digits are not known in advance.