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Bulk white label MVNO blank SIM cards (128k/256k/512k) from HKCARD ELECTRONICS

HKCARD ELECTRONICS CO., LIMITED is a professional SIM card manufacturer with over a decade of expertise in designing, producing, and personalizing re-programmable SIM cards for modern networks. We supply writable IMSI, Ki, ICCID, and OP/OPc SIM cards for 5G NR (SA/NSA), 4G LTE/USIM, and IoT/M2M applications. As a direct SIM card manufacturer, we provide bulk SIM solutions, white label SIM cards for MVNOs, and Sysmocom-compatible test SIMs for labs and R&D.

1. About HKCARD ELECTRONICS CO., LIMITED

With more than 10 years in the mobile phone SIM cards industry, HKCARD combines engineering-grade quality with flexible customization and global export capability. We focus on re-programmable (not one-time burn) SIM cards for:

  • Network testing and validation
  • IoT and M2M deployments
  • MVNO and private network projects
  • R&D laboratories and universities
  • Private 4G/5G network infrastructure

Our portfolio includes USIM/LTE SIM cards, 4G LTE/WCDMA blank cards, and advanced programmable SIM card 5G products.

2. Complete Programmable SIM Card Portfolio

A. Core Writable Parameters

Our programmable SIM cards give you full control over key identity and security fields, all re-writable using standard tools (e.g., pySim, PC/SC readers).

  • Writable IMSI SIM Cards – Set any International Mobile Subscriber Identity.
  • Writable Ki SIM Cards – Program the authentication key securely.
  • Writable ICCID SIM Cards – Define your own card serial number scheme.
  • Writable OP/OPc SIM Cards – Configure operator algorithm variants (Milenage, etc.).
  • Writable KEY SIM Cards – Additional security key fields.
  • Writable SPN SIM Cards – Control the Service Provider Name on the device.
  • Writable MCC/MNC SIM Cards – Fully define Mobile Country/Network Codes.

B. Network Technology Support

  • 5G NR (SA & NSA): Programmable 5G NR 3GPP R16 SA 5G SIM Cards with SUCI (Subscription Concealed Identifier) support.
  • 4G LTE / USIM: 128K/256K/512K USIM cards with VoLTE support, ideal for 4G VoLTE tester setups.
  • Legacy & IoT: 2G/3G GSM support, optimized IoT/Evaluation SIM Cards (128K) for sensors, trackers, and smart meters.

C. Physical Form Factors & Special Types

  • Form Factors: 2FF (Standard), 3FF (Micro), 4FF (Nano-USIM), and 3-in-1 triple-cut combo cards.
  • Special Variants:
    • Blank SIM Cards / Empty SIM Cards – Completely unprogrammed.
    • White SIM Cards / White Label SIM Cards – Unbranded or custom-branded for MVNOs.
    • Dummy SIM Cards – For device fitting and retail demonstration (no network access).
    • CDMA/RUIM/UIM Cards – For CDMA and multi-mode devices.
    • Java SIM Cards – For custom applet deployment.
    • NFC SIM Cards – With secure element for contactless payments/identity.

3. Sysmocom & Open-Source Ecosystem Compatibility

HKCARD is a leading Sysmocom alternative, providing drop-in compatible replacements for:

  • sysmoISIM-SJA2 (sysmoisim-sja2)
  • sysmoUSIM-SJS1 (sysmousim-sjs1)
  • sysmoISIM-SJA5 (sysmoisim-sja5)

Our cards are engineered for seamless integration with:

  • pySim and other PC/SC-based SIM programming tools.
  • Open-source stacks: Open5GS, srsRAN, Magma, OpenAirInterface (OAI).
  • University & R&D labs for LTE/5G protocol development.

Advantages: Better availability, shorter lead times, competitive pricing, and direct manufacturer support.

4. Technical Specifications & Quality

  • Memory: 128K, 256K, 512K EEPROM options.
  • Algorithms: Milenage (3GPP), COMP128-1/2/3, CAVE (CDMA), custom.
  • OS: Native COS or Java Card 3.0.1 Classic.
  • Certifications: ISO 7816, CE, FCC, RoHS.
  • Manufacturing: ISO 9001:2015 and ETSI/3GPP compliant.
  • Security: Secure key injection, anti-cloning, tamper-resistant design.

5. Applications & Target Users

  • Telecom Operators & MVNOs: Test fleets, white label SIM card programs, custom branding.
  • IoT & M2M Developers: Device authentication in private networks, smart meters, asset trackers.
  • Research Labs & Universities: Open5GS, srsRAN, 5G protocol research, and evaluation kits.
  • Network Equipment Manufacturers (NEMs): Integration testing and device certification.
  • Private/Enterprise Network Operators: Campus 4G/5G with full identity control.
  • Security Researchers: Cellular protocol penetration testing.

6. Why Choose HKCARD ELECTRONICS CO., LIMITED?

✅ 10+ Years Specialized Experience in programmable and custom SIM manufacturing.
✅ True Sysmocom Compatibility – Drop-in replacements for sysmoISIM/SJS1 series.
✅ Re-Programmable & Flexible – Not one-time burn; supports multiple write cycles.
✅ Fast Lead Times & OEM Branding – Responsive production and white label services.
✅ Dedicated Technical Support – Assistance for Open5GS/srsRAN, pySim, and integration.
✅ Global Supply Chain – Reliable bulk shipments to 60+ countries.

7. Frequently Asked Questions (FAQ)

Q1: Are HKCARD SIMs truly re-programmable?
A: Yes. All our cards are re-programmable (not one-time burn). You can rewrite IMSI, Ki, OP/OPc multiple times using PC/SC readers and tools like pySim.

Q2: Are they compatible with Sysmocom tools (sysmoISIM-SJA2)?
A: Absolutely. They are form-factor, file-system, and functionally compatible with sysmoISIM-SJA2, sysmoUSIM-SJS1, and work seamlessly with pySim.

Q3: What form factors do you offer?
A: 2FF (Standard), 3FF (Micro), 4FF (Nano), and 3-in-1 triple-cut cards. We also offer MFF2 chip modules.

Q4: Do you support 5G Standalone (SA)?
A: Yes. Our Programmable 5G NR R16 SA SIM Cards fully support SUCI encryption and standalone core authentication.

Q5: What memory sizes are available?
A: 128K (IoT/evaluation), 256K (basic applets), 512K (multi-application profiles).

Q6: Can I order completely blank/white SIMs?
A: Yes. We supply blank SIM cards, white SIM cards, and empty SIM cards with no pre-loaded data.

Q7: Which software can program your SIMs?
A: pySim, SIM Personalize Tools, Sysmocom tools, and any PC/SC-compliant software.

Q8: Do you offer NFC SIMs?
A: Yes. We provide NFC SIM cards with secure elements for payments and digital identity.

Q9: What is the MOQ?
A: Standard MOQ is ~100 units for testing. Volume discounts start at 1,000+ units. We accommodate pilot projects.

Q10: Are your cards used in academia?
A: Yes. They are widely used in Open5GS, srsRAN, and university R&D labs for LTE/5G evaluation.

Contact HKCARD ELECTRONICS CO., LIMITED

Ready to power your project with reliable, writable SIM cards?

HKCARD ELECTRONICS CO., LIMITED
📧 Email: byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp / WeChat: +86 158 1737 2512

Contact us for:

  • Product samples and datasheets
  • Technical consultation on Sysmocom/pySim compatibility
  • Quotes for bulk SIM, white label SIM, or programmable SIM orders
  • Custom SIM card personalization services