HKCARD Electronics: The Trusted Supplier of Programmable SIM Cards for 4G LTE, 5G NR & IoT (Sysmocom-Compatible)
Programmable SIM Cards for 4G/5G & IoT | HKCARD – Sysmocom SJA2 / SJS1 Alternatives
HKCARD Electronics supplies high-quality programmable SIM cards, blank SIMs, and custom USIMs for 4G LTE, 5G SA, IoT, and test labs. Fully compatible with pySim, Sysmocom (SJA2, SJS1, SJA5), Open5GS & srsRAN. Fast worldwide shipping, bulk pricing, and 15+ years of expertise.
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HKCARD Electronics – Your Reliable Partner for Programmable SIM Cards Since 2009
With over 15 years of experience in the mobile phone SIM cards industry, HKCARD Electronics Co., Limited has become a leading manufacturer and supplier of programmable SIM cards, blank SIM cards, and custom USIM solutions. We serve telecom operators, MVNOs, IoT developers, universities, and private 5G labs worldwide.
Our re-programmable (not one-time burn) SIM cards allow full customization of IMSI, Ki, ICCID, OP/OPc, MNC, MCC, and more — using standard PC/SC tools like pySim. Whether you need 4G LTE/WCDMA blank cards, 5G NR 3GPP R16 SA SIM cards, or NFC SIMs, HKCARD delivers high-quality, cost-effective solutions with fast delivery.
Full Range of Programmable SIM Cards from HKCARD
Writable & Fully Customizable SIM Cards
- Writable IMSI SIM Cards (including free programming samples for qualified projects)
- Writable Ki SIM Cards
- Writable ICCID SIM Cards
- Writable OP/OPc SIM Cards
- Writable KEY, SPN, MNC, MCC SIM Cards
All cards are re-programmable, not one-time burn, and compatible with pySim and other open-source tools.
Advanced 4G LTE & 5G Solutions
- USIM / LTE SIM Cards (not GSM-only)
- 4G LTE/WCDMA blank cards
- Programmable 5G SIM Cards
- Programmable 5G NR 3GPP R16 SA 5G SIM Card
- 5G SA 128K SIM / 5G USIM
- SUCI SIM Card (Subscription Concealed Identifier support)
IoT, NFC & Specialized SIMs
- IoT/Evaluation SIM Cards
- NFC SIM Cards (for payments, access control, parking systems)
- Java SIM Cards (custom applet loading)
- White Label MVNO SIM Cards
- CDMA SIM Cards (UIM / RUIM)
Form Factors & Capacities
- 2FF / 3FF / 4FF SIM Cards (Mini, Micro, Nano)
- 128K USIM, 256K SIM, 512K SIM
- Nano-USIM, half SIM card LTE trio, multi-network 4G VoLTE SIM cards
Looking for Sysmocom Alternatives? Choose HKCARD
Thousands of engineers worldwide rely on Sysmocom SIM cards such as:
- sysmoISIM-SJA2 (SJA2)
- sysmoUSIM-SJS1
- sysmoISIM-SJA5
HKCARD manufactures form-, function-, and file-system-compatible programmable SIM cards that work perfectly with:
- pySim and any PC/SC-based programming tools
- Open5GS, srsRAN, and other open-source LTE/5G stacks
- USIM test solution environments in universities and labs
Enjoy better availability, lower pricing, and faster shipping than traditional Sysmocom products — without compromising compatibility.
Who Uses HKCARD Programmable SIM Cards?
- Telecom operators & MVNOs (network testing, VoLTE, 5G rollout)
- IoT & M2M developers (NB-IoT, LTE-M, smart devices)
- Private 5G / Open RAN labs
- Universities & research institutions
- Security researchers (SUCI, Ki, OPc testing)
- NFC payment & access control system integrators
Frequently Asked Questions (FAQ)
Q1. What is a programmable SIM card?
A programmable SIM card (also called blank SIM or writable SIM) allows you to write IMSI, Ki, ICCID, OPc, etc., using tools like pySim. HKCARD cards are fully re-programmable.
Q2. Are your SIM cards compatible with sysmoISIM-SJA2?
Yes. Our cards are drop-in replacements for sysmoISIM-SJA2, sysmoUSIM-SJS1, and sysmoISIM-SJA5.
Q3. Can I program the cards with pySim?
100% compatible with pySim and all standard PC/SC readers.
Q4. Do you offer 5G SA SIM cards?
Yes — we supply Programmable 5G NR 3GPP R16 SA SIM cards and 5G SA 128K SIMs.
Q5. What form factors do you provide?
2FF (Mini), 3FF (Micro), 4FF (Nano), and punch-out trio cards.
Q6. Do you sell white label SIM cards for MVNOs?
Yes, we specialize in white label MVNO SIM cards and custom branding.
Q7. Can I order dummy SIM cards for device testing?
Yes — we supply dummy SIM cards, fake SIMs, and mechanical test cards.
Q8. Do you ship worldwide and offer bulk discounts?
Yes — fast global shipping and excellent wholesale SIM card pricing.
Q9. Are NFC SIM cards available?
Yes — full range of NFC SIM cards for payments, access, and IoT.
Q10. How do I get started?
Contact us at byronhan@cardmfg.com — we can send free writable IMSI SIM card samples to qualified customers.
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Contact HKCARD Today – Your Reliable SIM Card Partner
Ready for programmable SIM cards that work perfectly with your tools and budget?
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
📦 Bulk Orders & Free Samples Available
Fast worldwide shipping | 15+ years of expertise | Direct factory pricing
HKCARD Electronics – Powering the next generation of mobile connectivity
