What is a 4G SIM Card?

Sim Cards
A SIM Card is a small "smartcard" that is inserted into a 4G Device. The 4G SIM Card contains the subscriber profile, which includes detailed information that the device needs in order to work on the Wireless network. The 4G subscriber profile includes: International Mobile Subscriber Identity (IMSI), which is used for billing details The 4G Service Feature Set, which contains details about the subscribed services and features Security authentication and ciphering information Access to passwords to lock and unlock the SIM, including the Personal Identification Number (PIN) and the Personal Unblocking Key (PUK) codes

Sim Card Sizes

Sim Card Sizes


25mm by 15mm


15mm by 12mm


12.3mm by 8.8mm


Each SIM is internationally identified by its integrated circuit card identifier. ICCIDs are stored in the SIM cards and are also printed on the SIM card. Most Sim Card ICCIDs are 20 digits long.