When developing telecom infrastructure, deploying IoT fleets, or running QA tests on mobile hardware, your testing environment is only as good as your SIM architecture. Standard carrier cards simply don’t offer the flexibility that developers and network engineers need.

For over a decade, HKCARD ELECTRONICS CO., LIMITED has been a trusted supplier in the telecommunications industry. We specialize in manufacturing high-quality blank SIM, USIM, and ISIM cards designed specifically for testing, development, and telecom deployments. From legacy GSM networks to modern 4G LTE and VoLTE applications, we provide the blank canvas your engineering team needs to build, test, and scale.

Why Telecom Professionals Rely on HKCARD

We don’t just sell plastic; we deliver highly customizable telecom hardware. Our engineering background allows us to understand the complex requirements of mobile application developers, device OEMs, and network operators.

Our cards are designed with 128K and 256K memory options, boast a data retention lifespan of over 10 years, and are fully compliant with RoHS and WEEE environmental standards. More importantly, we hand the keys over to you. Our programmable cards allow your team to fully customize parameters including ICCID, IMSI, KI, OPC, OP, and ADM, making them the perfect tool for simulating diverse subscriber profiles and validating network registration procedures.

Our Core Product Categories

Rather than a generic catalog, we’ve structured our solutions to match your specific project phases—from bench testing to mass deployment.

1. R&D and Lab Testing Cards

If you are doing network troubleshooting, battery consumption analysis, or validating device compatibility, you need cards that can be written, erased, and rewritten.

  • Intelligent Writable 4G LTE & VoLTE Cards: Ideal for advanced R&D labs and 5G preparation projects. These ISIM/USIM cards support FDD, WCDMA, and GSM, offering advanced encryption and optional wireless programming capabilities.
  • Advanced Parameter Testing: We supply specialized 128k LTE programmable USIM cards that support advanced programming (ICCID, IMSI, ADM, KI, OPC, OP) and include specific telecom features like mileage support, which are crucial for specialized payment systems or secure IoT projects.

2. Scalable Supply: From Prototypes to Bulk Orders

Whether you are an independent developer needing a handful of cards or a manufacturer requiring bulk components, we package our products to fit your scale:

  • 5-Piece & 10-Piece Lots: Perfect for field engineers, educational institutions, and small QA teams. These writable Nano/Micro 4G LTE cards are ideal for continuous testing environments.
  • 100-Piece Bulk Lots: Designed for telecom distributors and OEM device integration.
  • Universal Form Factors: You no longer need to worry about slot sizes. Our cards feature a 3-in-1 design (2FF Mini, 3FF Micro, 4FF Nano) and come with adapters, allowing field engineers to switch smoothly between different hardware prototypes.

3. Complete Hardware & Software Kits

For teams building a testing lab from scratch, we provide out-of-the-box hardware and software bundles:

  • The Complete Developer Toolkit: We offer a comprehensive package that includes a USB SIM card reader/writer, 5 pieces of 128K 4G VoLTE blank ISIM cards, and our proprietary 2G/3G/4G/5G SIM card software (Version 4.1.5). It’s everything a network engineer needs to start programming immediately.
  • HID Omnikey 3121 Integration: For enterprise security and access control testing, our blank 4G VoLTE ISIM/USIM cards are guaranteed to be fully compatible with the industry-standard HID Omnikey 3121 Smart Card Reader (USB 2.0 Desktop interface).

Partner With a Proven Manufacturer

Whether you are a telecom operator launching a new VoLTE service, a hardware OEM validating signal optimization, or an IoT startup needing custom authentication solutions, HKCARD ELECTRONICS CO., LIMITED is your reliable partner. We combine top-tier manufacturing quality with the custom programming services required to make your deployment a success.

We offer fast shipping globally (3-5 days for standard products, 7-10 days for custom-programmed batches) and highly competitive pricing for bulk wholesale orders.

Ready to upgrade your testing environment? Reach out to our team today:

Frequently Asked Questions (FAQ)

Q: What is the technical difference between SIM, USIM, and ISIM cards?
A: Standard SIMs (Subscriber Identity Modules) are built for legacy 2G/3G networks. USIMs (Universal SIM) feature an upgraded directory structure designed for 3G, 4G, and LTE networks. ISIMs (IP Multimedia Services Identity Module) contain specific parameters required for authenticating VoLTE and IMS services.

Q: Can you pre-program custom ICCID and Authentication Keys (KI) before shipping?
A: Yes. While our blank cards allow you to do this yourself, we also offer factory-level custom programming services for ICCID, IMSI, KI, OPC, and other parameters to save your team time upon delivery.

Q: Do these cards require proprietary reading hardware?
A: No. Our blank SIM and USIM cards follow global ISO standards and are fully compatible with standard contact smart card readers, including the popular HID Omnikey 3121.

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2G/3G/4G/5G Ver 4.1.5 SIM card software