CableFree SIM cards for 4G LTE & 5G NR Networks

Custom SIM cards are available for operators using CableFree LTE equipment. SIM cards can be customised with operator branding and specific information. A compatible SIM card is required in all LTE & 5G networks to enable the User Equipment (UE) CPE device to connect to the LTE or 5G network. For Private LTE networks, the SIM cards are programmed with suitable data to enable access just by relevant devices and users.

CableFree Custom SIM cards

Customisable Branding for SIM cards

The Front and Rear of the SIM cards are customisable with branding and user instructions.
The IMSI number and any other required customer/user-specific identifiers can be printed on the card also. Shown above is a unique IMSI number.

SIM card Data

A SIM card stores data such as the IMSI, Ki, and OPc, which are required to connect a device to an LTE network. These are unique to each LTE network and are specified by the Network Operator.

IMSI
The International Mobile Subscriber Identity (IMSI) is a unique identifier for a cellular network user. It is stored as a 64-bit field and is sent by the phone to the network. It is also used for acquiring other details of the mobile in the home location register (HLR) or as locally copied in the visitor location register.

Authentication key (Ki)
The Ki is a 128-bit value used to authenticate SIM cards on GSM mobile networks. For USIM networks, Ki is required alongside other parameters. Each SIM has a unique Ki assigned by the operator during the personalisation process, which is stored in the carrier’s Authentication Centre (AuC) database.

SIM card Security

CableFree SIM cards feature the latest in security.
The COMP128 algorithms implement the A3 and A8 algorithms defined in the GSM standard. A3 authenticates the mobile station to the network, while A8 generates the session key for the A5 algorithm, which encrypts data between the mobile station and the Base Transceiver Station (BTS).

The following COMP128 algorithms are in use:
COMP128-1 – original algorithm with known weaknesses
COMP128-2 – stronger algorithm which still clears the 10 rightmost bits of Kc
COMP128-3 – same algorithm as COMP128-2 with all 64 bits of Kc generated
COMP128-4 – based on the 3GPP (3rd Generation Partnership Project) algorithm “Milenage”, which uses AES

Privacy and Roaming

SIM cards provided by CableFree are typically dedicated to work just to the user network where roaming on/off the network is deliberately not supported. This is because the customer networks are often “closed” in nature and there is no support for billing of users who roam into the network.

Physical Sizes

SIM cards have been made smaller over the years; functionality is independent of format. Full-size SIM were followed by Mini-SIM, Micro-SIM, and Nano-SIM. SIM cards are also made to be embedded in devices.
For most Outdoor, Desktop and MiFi LTE CPE devices, Mini-SIM (2FF) is most popular. In the samples above, the 2FF format can be “snapped out” by the user when installing. Optionally, smaller outline SIMs are available.

Product Data

 PDF Datasheet

For Further Information

Please Contact Us for more information on our exciting range of solutions using LTE technology.