Programmable SIM Cards | 4G/5G, IoT, Writable IMSI/Ki | Sysmocom Alternative – HKCARD
HKCARD Electronics is a reliable manufacturer supplying programmable SIM cards for 4G LTE, 5G SA, and IoT testing. Our writable SIMs are compatible with pySim, Open5GS, srsRAN, and Sysmocom (SJA2, SJS1). Order bulk SIMs, 128K USIMs, and custom white label solutions globally.
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HKCARD Electronics: Your Trusted Global Supplier of Programmable 4G LTE & 5G SIM Cards
With over a decade of experience, HKCARD ELECTRONICS CO., LIMITED is an industry-leading SIM card manufacturer and reliable supplier in the mobile phone SIM cards industry. We specialize in providing advanced, re-programmable (not one-time burn) SIM cards designed for the complexities of modern telecommunications, including 4G LTE, 5G NR Standalone (SA), and massive IoT deployments.
Our mission is to equip developers, telecom operators, MVNOs, and research institutions with fully customizable blank SIM cards that offer seamless compatibility with open-source tools like pySim and industry standards used in USIM test solution environments.
Full Control: Writable SIM Cards for Every Network Parameter
HKCARD’s programmable cards grant you deep access to crucial network and security files, allowing for comprehensive testing and rapid customization. Our cards are designed to be programmed efficiently using standard PC/SC tools (e.g., pySim).
Writable Parameters Supported by HKCARD SIM Cards:
- Writable IMSI SIM Cards: Customize the International Mobile Subscriber Identity freely. (Ask about writable imsi sim cards free samples for evaluation!)
- Writable Ki SIM Cards: Set the authentication key for network access and security testing.
- Writable ICCID SIM Cards: Rewrite the unique SIM card identifier.
- Writable OP or OPc SIM Cards: Essential for 4G LTE and 5G authentication procedures.
- Writable KEY SIM Cards: For various encryption and authentication processes.
- Writable SPN SIM Cards: Define the Service Provider Name displayed on the mobile device.
- Writable MNC & MCC SIM Cards: Configure Mobile Network Codes and Mobile Country Codes.
We guarantee that our cards are re-programmable, offering maximum lifespan and cost efficiency for R&D projects.
Advanced Solutions for 4G LTE, VoLTE, and 5G NR Networks
HKCARD ensures your testing environment is future-proof. We supply cards that support the highest standards of modern connectivity, far beyond GSM-only capabilities.
5G NR and USIM Solutions
- Programmable 5G SIM Card: Ready for the next generation of mobile networking.
- Programmable 5G NR 3GPP R16 SA 5G SIM Card: Explicitly designed for 5G Standalone core network environments.
- 5G SA 128K SIM / 5g usim: High-capacity memory optimized for 5G R16 requirements.
- SUCI SIM Card (Subscription Concealed Identifier): Critical for testing 5G security protocols.
- USIM / LTE SIM Cards (Strictly not GSM-only).
4G LTE, IoT, and Specialized Cards
- 4G LTE/WCDMA blank cards
- Multi network 4g volte sim card
- IoT/Evaluation SIM Cards
- Custom SIM cards for 4G LTE & 5G NR Networks
- UIM Card / RUIM Card (CDMA SIM Card) compatibility.
- Blank eSIM options are available upon request for digital deployment.
The Best Sysmocom Alternative for Open-Source Testing
Are you currently using or searching for sysmocom SIM card products like sysmoISIM-SJA2, sysmoUSIM-SJS1, or sysmoISIM-SJA5?
HKCARD offers form-, function-, and file-system-compatible alternatives that provide superior availability and competitive pricing, making us the top choice for developers and labs requiring reliability without the Sysmocom lead times.
HKCARD’s programmable SIM cards work smoothly with:
- pySim and other PC/SC based sim programming tools.
- Open-source stacks for LTE/5G, including Open5GS, srsRAN, and similar setups.
- Standard USIM test solution environments.
Looking for Sysmocom Alternatives? Choose HKCARD’s Programmable Test SIM Cards.
Form Factors and Wholesale SIM Card Solutions
We support every required physical standard and business model:
Available Form Factors:
- 2FF / 3FF / 4FF SIM Cards (Standard, Micro, Nano)
- nano-usim
- Simcard half lte trio (The popular punch-out format)
Specialty Cards & Capacity
- White sim card / White sims / Blank sim / Empty sim card (Ready for personalization).
- 128K USIM, 256K SIM, 512K SIM for maximum storage.
- NFC SIM / SIM card NFC / Sim wallet nfc for payment integration.
- Sim dummy / Fake sim / Dummy sim card / Dummy sim card airtel for mechanical device testing.
- White label mvno sim cards / Sim card wholesale supplier / Bulk sim: Factory-direct pricing for large volume orders.
Frequently Asked Questions (FAQs)
Q1: Are HKCARD’s programmable SIM cards truly re-programmable?
Yes. Our cards are manufactured specifically as re-programmable testing and evaluation SIMs, not one-time burn cards.
Q2: Are you a reliable supplier for wholesale SIM card orders?
Absolutely. As an experienced sim card manufacturer and sim card wholesale supplier, we manage bulk sim orders efficiently with competitive, factory-direct pricing.
Q3: How can I program the writable parameters (IMSI, Ki, ICCID)?
You can use standard PC/SC readers and open-source software like pySim or other sim personalize tools tailored for USIM/ISIM programming.
Q4: Do you offer alternatives to sysmoISIM-SJA2 and SJS1?
Yes, we provide fully compatible alternatives to sysmoISIM-SJA2, sysmoUSIM-SJS1, and sysmoISIM-SJA5 (sja2) with superior availability and pricing.
Q5: Can I use these cards for 5G Standalone (SA) testing?
Yes, we supply Programmable 5G NR 3GPP R16 SA 5G SIM Cards which include SUCI sim card support.
Q6: Do you supply dummy SIM cards?
Yes, we provide dummy sim card and fake sim products for mechanical testing (e.g., insertion and removal tests).
Q7: What is the significance of 128K USIM capacity?
The 128k usim capacity is standard for modern 4G/5G testing, allowing enough space for ISIM, USIM, and necessary application files.
Q8: Are NFC features supported?
Yes, we supply NFC SIM cards suitable for sim cards near field communication market applications, including parking sim cards and mobile payments.
Q9: Do you offer free samples?
We offer writable imsi sim cards free samples or evaluation kits for qualified B2B partners and educational institutions.
Q10: What kind of support is available for 4G VoLTE testers?
Our 4g volte tester solutions utilize our programmable USIMs, ensuring you can correctly configure all necessary VoLTE parameters.
- “A variety of HKCARD white programmable SIM cards in 2FF, 3FF, and 4FF sizes, compatible with pySim and sysmoISIM-SJA2 for 5G testing.”
- “Close-up of a HKCARD 5G SA 128K USIM card and PC/SC reader, highlighting compatibility with Open5GS and srsRAN open-source LTE/5G stacks.”
Contact HKCARD Today for Samples or Bulk Orders
Don’t let high costs or supply chain issues halt your development. Choose HKCARD for reliable, high-performance sim card solutions.
📞 Contact us now to discuss your needs, request a custom quote, or arrange writable imsi sim cards free samples!
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
HKCARD ELECTRONICS CO.,LIMITED – Your global partner in mobile connectivity.
- Programmable 5G NR 3GPP R16 SA SIM Cards: Get Yours from HKCARD
- Sysmocom Alternatives: Reliable & Cost-Effective Programmable SIM Cards (SJA2, SJS1)
- Writable IMSI, Ki, ICCID SIM Cards for Open-Source Tools (pySim & Open5GS)
- Blank SIM Cards Wholesale Supplier for MVNOs, IoT, and 4G VoLTE Testing
- HKCARD: The Leading Manufacturer of 128K USIM and NFC SIM Card Solutions
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