Custom Branded Writable Programmable LTE SIM Cards – 2FF, 3FF, 4FF Triple‑Cut with Full Parameter Writing by HKCARD ELECTRONICS CO., LIMITED

When telecom operators, device manufacturers, and RF engineers need absolute control over SIM card programming, off‑the‑shelf consumer SIMs simply don’t cut it. HKCARD ELECTRONICS CO., LIMITED supplies a Writable Programmable LTE SIM Card that hands the reins to the professional: write IMSI, ICCID, Ki, OPc, SID, NID, AKEY, SMSC and a host of other parameters onto a genuine USIM chip, housed in a robust triple‑cut card body that breaks down into Standard (2FF), Micro (3FF) and Nano (4FF) sizes. And because testing infrastructure should wear your brand identity, we offer custom logo and full‑colour offset printing on both sides.

⚠️ Important Note: This card is delivered as a blank engineering tool. It requires specialist SIM programming software and knowledge of GSM/LTE authentication parameters. If you are not a professional engineer familiar with SIM card configuration, please do not purchase this item.

 Multi‑Standard Compatibility – One Blank USIM for GSM, WCDMA and 4G LTE Testing

HKCARD’s writable SIM card is designed to interoperate across all major cellular generations, making it a future‑proof asset for any lab or production line. It supports:

• 4G FDD‑LTE – EPS‑AKA authentication, VoLTE service (where ISIM is additionally programmed), and full data plane testing
• 3G WCDMA – UMTS AKA authentication for legacy 3G device validation
• 2G GSM – COMP128 v1/v2/v3 and CMCC COMP V0 algorithms for traditional GSM testing

This multi‑standard flexibility means you can use the same card to verify handover between technologies, test backward compatibility, or run call setup sequences across different RATs with a single inventory item.

The chip memory is available in 32K, 64K, 128K and 256K densities, giving you the headroom to store extensive USIM/STK applications or large phonebooks where necessary.

 Write Every Critical Parameter – Complete Control Over IMSI, ICCID, SID, NID, AKEY, SMSC and More

Unlike pre‑configured test SIMs that lock you into a vendor’s profile, HKCARD’s blank programmable card exposes the full file system of the USIM and SIM applications. Using industry‑standard programming software (the latest version download is available for qualified customers), you can write:

• IMSI, ICCID – subscriber and card identity
• SID / NID – CDMA network identifiers for those working with hybrid RUIM/SIM environments
• Ki / AKEY – authentication keys for GSM/CDMA
• PIN / PUK / ADM – card‑holder verification and security unlocking
• SMSC – short message service centre address
• AMD – administration data and supplementary service parameters

This level of access turns the SIM into a true test instrument. Rather than wrestling with incomplete diagnostic information from a locked consumer SIM, your test scripts get deterministic, repeatable results because the card parameters are exactly what you programmed.

 Triple‑Cut Architecture – Native 2FF, 3FF, and 4FF in One Card Body

Modern test environments are rarely homogeneous. You may have a legacy IoT module that uses a Mini‑SIM, a smartphone that takes a Nano‑SIM, and a ruggedised terminal built around a Micro‑SIM. HKCARD’s 3‑in‑1 punch‑out design eliminates the need to stock three separate form factors:

• Standard SIM (2FF) – 25 mm × 15 mm
• Micro SIM (3FF) – 15 mm × 12 mm
• Nano SIM (4FF) – 12.3 mm × 8.8 mm

Simply pop out the size you need. The gold contacts and chip placement are optimised for each form factor, guaranteeing reliable electrical contact without the stress and extra thickness of snap‑on adapters.

 Custom Logo and Full‑Colour Printing – Brand Your Test Infrastructure

Laboratories, operator‑owned test houses, and device manufacturers often want to label their test assets clearly. HKCARD offers 4+4 offset printing on both sides of the card, including:

• Your corporate logo
• Colour‑coded frames for rapid identification of different test profiles
• Sequential ICCID/IMSI numbers laser‑printed directly onto the card body for traceability
• Security patterns, barcodes, or QR codes upon request

The printing fee for one complete design (both sides) is already included in this listing. Once your artwork is approved, production batches are manufactured with consistent colour fidelity and clean registration — even at high volumes.

 Engineered for the Professional – Not for Consumer Use

Because the blank SIM card can be written with arbitrary network parameters, it is exclusively intended for:

• Mobile network operator lab testing
• GSM/LTE system integration and commissioning
• Device compliance and certification programs
• SIM card unlocking research and chip‑level debugging
• Advanced engineering workshops where users programme the latest LTE write software to study authentication mechanisms

HKCARD does not provide technical support for consumer‑oriented applications such as illegal carrier unlocking or fraudulent activity. By purchasing this product you confirm that you are a professional engineer or qualified technician working under the appropriate telecommunications regulations of your country.

📬 Order Your Custom Programmable SIM Cards Today

Tell us your chip memory requirements, the algorithm profile you need, and your logo artwork. We will respond with a quotation and lead time.

HKCARD ELECTRONICS CO., LIMITED – Writable Programmable LTE SIM Cards with Custom Logo, Triple‑Cut, GSM/WCDMA/LTE for Telecom Professionals Worldwide.