HKCARD – Custom, Re‑programmable & 5G SIM Card Supplier | 10+ Years Experience
HKCARD Electronics offers writable IMSI, Ki, OP/OPc, ICCID, SPN, MNC, MCCSIM and programmable SIM cards for 4G, 5G, IoT and evaluation labs. Compatible with Sysmocom, pySim and open‑source LTE/5G stacks. Fast quoting, bulk pricing, worldwide delivery.
1. Introduction
For more than 10 years, HKCARD Electronics Co., Ltd. has been a leading provider of custom, blank, writable and programmable SIM cards for mobile operators, MVNOs, IoT developers and test laboratories. Our SIMs support USIM/LTE, 4G LTE/WCDMA, 5G NR, 3GPP R16 SA and a full range of form factors and data capacities. All products are built to work with Sysmocom, pySim, and popular open‑source stacks (Open5GS, srsRAN), making us the perfect Sysmocom alternative when availability or lead‑time becomes an issue.
2. What We Offer
Writable & Re‑programmable SIM Cards
- Writable IMSI SIM Cards – change IMSI on demand for testing and provisioning.
- Writable Ki SIM Cards and Writable ICCID SIM Cards – essential for authentication and network routing.
- Writable OP/OPc SIM Cards, Writable KEY SIM Cards, Writable SPN SIM Cards and Writable MNC/MCCSIM Cards – easy re‑programming of authentication, service‑profile and country‑code elements.
- Re‑programmable (not one‑time‑burn) SIM Cards – fully updatable for research labs, pilot deployments and iterative development.
Programmable SIM Cards with PC/SC Tools
All cards can be programmed through PC/SC interfaces using tools such as pySim, making the process fast and transparent.
USIM/LTE & 5G‑Ready Solutions
- USIM / LTE SIM Cards (not GSM‑only) – support VoLTE, WCDMA and 4G data services.
- Programmable 5G NR 3GPP R16 SA SIM Cards – designed for next‑generation standalone 5G networks.
- Custom SIM Cards for 4G LTE & 5G NR Networks – choose 128K, 256K or 512K memory, colour, logo and brand name.
- Programmable 5G NR 3GPP R16 SA 5G SIM Card and HKCARD’s Programmable 5G NR 3GPP R16 SA 5G SIM Card – ready for commercial roll‑out.
Blank / Evaluation / MVPN Options
- 4G LTE/WCDMA blank cards and IoT/Evaluation SIM Cards for rapid prototyping.
- White‑label MVNO SIM cards, off‑brand SIMs, fake SIMs, dummy SIM cards, sim dummy, blank Sim Card Airtel, sysmoISIM‑SJA2, sysmoISIM‑SJA5, SJA2, sysmoUSIM‑SJS1 and other Sysmocom‑compatible identifiers.
- Blank eSIM, nano‑USIM, nano‑SIM, 4FF, 3FF, 2FF and half‑LTE form factors.
- Multi‑network 4G LTE VoLTE SIM, NFC SIM, parking SIM, SIM wallet NFC, Td SIM, Ruim card, SJA cards and more.
Specialty & Niche Applications
- SIM Cards for field testing, research labs and USIM test solutions (e.g., usim test solution, USIM test environment).
- White‑label MVNO SIMs, SIM manufacturer, SIM card suppliers, bulk SIM cards, sim card wholesale, sim cards wholesale supplier.
- SIM Card Solutions for 4G VoLTE tester, SIM card creator, sim java, sim programming, custom SIM card, sim card nfc, suci SIM, suci sim ใช, sim card near field communication market, sim card manufacturer, sim card wholesale, sim card supplier, sim card wholesale supplier, etc.
3. Compatibility with Sysmocom, pySim & Open‑Source Tools
| Tool / Platform | How HKCARD Supports It |
|---|---|
| Sysmocom SIM card / sysmoISIM‑SJA2, sysmoUSIM‑SJS1, sysmoISIM‑SJA5 | Full technical equivalence in file system, IMSI/Ki format and security attributes. |
| pySim & other PC/SC tools | Ready‑to‑program cards; detailed documentation for sim programming and sim card creator workflows. |
| Open‑source LTE/5G stacks (Open5GS, srsRAN, OpenBTS) | SIMs are pre‑validated for use with these stacks; available as SIM Card Solutions for labs and universities. |
| USIM test environments | Offer blank SIM cards, dummy SIMs, SJA cards and SJA2 compatible variants for testing authentication and registration flows. |
If you are currently using sysmocom products and need a Sysmocom alternative with better lead‑time and pricing, HKCARD can provide form‑, function‑ and file‑system‑compatible SIM cards that drop straight into your existing workflow.
4. Frequently Asked Questions
Q1: What is a writable IMSI SIM card?
A1: A writable IMSI SIM card allows the IMSI value to be reprogrammed after manufacturing, which is ideal for network testing, provisioning and dynamic user management.
Q2: Do your SIMs work with 5G networks?
A2: Yes. We supply Programmable 5G NR 3GPP R16 SA SIM Cards that meet all SA‑R16 requirements, including 128K and 256K capacities.
Q3: Are the cards compatible with Sysmocom hardware?
A3: Absolutely. Our SIMs are fully compatible with SJA2, SJS1, SJA5 and other Sysmocom identifiers; they use the same file structure and can be programmed with pySim.
Q4: Which form factors are available?
A4: 2FF, 3FF, 4FF, nano‑USIM, nano‑SIM, blank eSIM, and custom half‑LTE sizes ranging from 128K to 512K.
Q5: Can I order blank or dummy SIM cards for testing?
A5: Yes – we stock blank SIM cards, dummy SIMs, fake SIMs, SIM dummy, SIM Card Airtel (blank) and many other test‑only variants.
Q6: Do you support open‑source platforms like Open5GS?
A6: Our SIMs are pre‑tested with Open5GS, srsRAN and other open‑source LTE/5G stacks; see our documentation for step‑by‑step sim programming guides.
Q7: What is the difference between a reprogrammable SIM and a one‑time‑burn SIM?
A7: A reprogrammable SIM can be updated multiple times (IMSI, Ki, OP/OPc, etc.), while a one‑time‑burn SIM locks the data after the first write. Reprogrammable cards are perfect for labs and iterative development.
Q8: Can I get white‑label or custom‑branded SIMs?
A8: Yes. We produce white‑label MVNO SIM cards, off‑brand SIMs, custom SIM cards, sim card creator files and fully branded designs on demand.
Q9: Are SIMs suitable for IoT deployments?
A9: Definitely. Our IoT/Evaluation SIM Cards and programmable 4G/5G SIMs support remote provisioning, OTA updates and global carrier routing.
Q10: How fast can I receive an order?
A10: Most standard orders ship within 24‑48 hours. Expedited options are available on request. Contact us at byronhan@cardmfg.com.
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- “Bulk SIM Card Supplier: White‑Label, Custom & Blank Options from HKCARD”
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HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
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