Question: What is the maximum allowed length for the ICC Identification Number (ICCID) stored in the EFICCID file on a SIM, as per 3GPP specifications for network operators issuing SIMs according to this standard?
Option 1: Up to 20 bytes, with flexibility in byte digit arrangement.
Option 2: Exactly 16 bytes, with mandatory digit swapping in each byte.
Option 3: A fixed length of 15 bytes, without any provision for variation.
Option 4: Minimum of 10 bytes, with no specified maximum length.
Explanation: According to the specifications, network operators issuing SIMs may utilize an ICCID of up to 20 bytes in length. Additionally, these SIMs can have their identification numbers stored without swapping the digits within each byte, offering flexibility in the arrangement.