Programmable SIM Cards for 4G/5G & IoT | HKCARD Electronics

HKCARD Electronics offers re-programmable, writable SIM cards for 4G LTE, 5G NR SA, and IoT testing. Fully compatible with pySim, Open5GS, srsRAN & Sysmocom (SJA2/SJS1). Fast global shipping.

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 HKCARD Electronics – Your Trusted Supplier of Programmable SIM Cards for 4G, 5G & IoT

With over 15 years in the mobile SIM card industry, HKCARD ELECTRONICS CO., LIMITED is a leading SIM card manufacturer providing high-quality, re-programmable (not one-time burn) SIM cards for telecom operators, MVNOs, IoT developers, private 5G labs, and research institutions worldwide.

Why Choose HKCARD for Your Programmable SIM Needs?

• 15+ years’ proven experience in mobile and IoT connectivity
• Direct factory pricing, fast worldwide shipping, and dedicated technical support
• Full customization: IMSI, Ki, ICCID, OP/OPc, KEY, SPN, MNC, MCC and more
• Compatibility with PC/SC tools (e.g., pySim) and open-source stacks (Open5GS, srsRAN)
• Sysmocom alternatives (sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5)

 Our Programmable SIM Card Portfolio

Writable & Re-programmable SIM Cards

• Writable IMSI SIM Cards
• Writable IMSI SIM Cards free (sample program)
• Writable Ki SIM Cards
• Writable ICCID SIM Cards
• Writable OP/OPc SIM Cards
• Writable KEY SIM Cards
• Writable SPN SIM Cards
• Writable MNC & MCC SIM Cards

All re-programmable via PC/SC readers and pySim, ideal for R&D, network testing, and security labs.

4G LTE & 5G NR Solutions

• USIM / LTE SIM Cards (not GSM-only)
• 4G LTE/WCDMA blank cards for VoLTE, multi-network deployments
• Programmable SIM card 5G (3GPP R16 SA compliant)
• HKCARD’s custom SIM cards for 4G LTE & 5G NR networks
• Programmable 5G SA 128K SIM Cards with SUCI support

IoT, Evaluation & Specialty SIMs

• IoT/Evaluation SIM Cards for NB-IoT, LTE-M
• Java SIM Cards for custom applets
• NFC SIM / SIM card NFC for contactless payments, parking (sim wallet nfc)
• Dummy SIM / Fake SIM / UIM & RUIM cards for mechanical testing
• White label MVNO SIM Cards, blank eSIMs on request

 Form Factors & Capacities

• 2FF / 3FF / 4FF SIM Cards (mini, micro, nano, punch-out half-SIM trio)
• White SIM Cards / Blank SIM Cards / Empty SIM Cards
• High-capacity cards: 128K USIM, 256K SIM, 512K SIM

Perfect Sysmocom Alternatives & Open-Source Compatibility

Many customers rely on sysmocom SIM cards (sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5). HKCARD supplies drop-in replacements that:

• Match form factor, file system, and functionality
• Integrate seamlessly with pySim, Open5GS, srsRAN
• Support standard USIM test solution environments

Looking for Sysmocom alternatives? Choose HKCARD’s programmable test SIM cards for better availability and competitive pricing.

Who Benefits from HKCARD’s Programmable SIM Cards?

• Telecom operators & MVNOs launching 4G/5G services
• Private 5G & Open RAN labs
• IoT device manufacturers & evaluators
• University research groups
• Security and privacy testing teams
• NFC-based payment & access system integrators

Frequently Asked Questions (FAQs)

1. What are programmable SIM cards?
   SIMs that let you rewrite IMSI, Ki, ICCID, OP/OPc, MNC, MCC, SPN, keys—re-programmable via PC/SC tools like pySim.

2. Are these SIM cards one-time burn?
   No. HKCARD’s SIMs are re-programmable for unlimited test cycles.

3. Can I get free writable IMSI SIM card samples?
   Yes—qualified developers may receive writable IMSI SIM cards free under our sample program.

4. Do you provide Sysmocom-compatible cards?
   Absolutely—our cards replace sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5 seamlessly.

5. Are your SIMs compatible with Open5GS and srsRAN?
   Yes, they work out-of-the-box with Open5GS, srsRAN, and similar open-source stacks.

6. What form factors do you offer?
   2FF, 3FF, 4FF, nano-USIM, half-SIM LTE trio punch-outs, and blank eSIM options.

7. Do you support NFC SIM cards?
   Yes—SIM wallet NFC cards for payments, parking access, and IoT.

8. Can I program Java applets on your SIMs?
   Yes—our Java SIM cards support custom applet loading and testing.

9. What capacity options are available?
   128K USIM, 256K SIM, and 512K SIM for advanced storage needs.

10. How do I place a bulk order?
    Email byronhan@cardmfg.com or visit our website to request a quote and lead time.

1. Alt Text: “HKCARD programmable SIM cards (2FF, 3FF, 4FF) for 4G LTE and 5G NR testing with pySim integration.”
2. Alt Text: “Engineer configuring HKCARD re-programmable 5G SA 128K USIM in lab using Open5GS.”

1. “Sysmocom SJA2 Alternative: HKCARD’s Programmable Test SIM Cards”
2. “Writable IMSI & Ki SIM Cards for 5G Testing – Free Samples from HKCARD”
3. “Blank SIM Cards for MVNO & IoT – Bulk Pricing by HKCARD”
4. “How to Program a SIM Card with pySim: A Developer’s Guide by HKCARD”
5. “NFC SIM Cards for Smart Parking & Access – HKCARD Electronics”

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HKCARD ELECTRONICS CO., LIMITED

📧 Email:byronhan@cardmfg.com

🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512