HKCARD ELECTRONICS CO., LIMITED is a professional SIM card manufacturer with over 10 years of experience in designing and producing programmable SIM cards and writable SIM cards. We specialize in re-programmable USIM/LTE and 5G SA SIM cards that support full customization of IMSI, Ki, ICCID, OP/OPc, and other critical parameters.
Our solutions are widely used by telecom operators, MVNOs, IoT developers, R&D laboratories, and private 4G/5G network providers who require flexible, high-quality SIM cards for testing and commercial deployment.
1. Complete Programmable SIM Card Portfolio
HKCARD offers true programmable SIM cards that can be configured using standard PC/SC readers and tools such as pySim. Instead of fixed operator profiles, users gain full control over essential network parameters.
Writable IMSI, Ki, ICCID and More
Our cards support the following programmable fields:
- Writable IMSI SIM Cards – Freely change the IMSI to match your test network or private core
- Writable Ki SIM Cards – Program the authentication key securely
- Writable ICCID SIM Cards – Define your own card serial numbering
- Writable OP/OPc SIM Cards – Configure Milenage or custom algorithms
- Writable SPN SIM Cards – Control the Service Provider Name displayed on devices
- Writable MCC/MNC SIM Cards – Fully define network identity for lab, MVNO, or private LTE/5G use
All re-programmable SIM cards allow multiple write cycles, making them ideal for repeated testing and development work.
2. 5G NR and 4G LTE Solutions
HKCARD provides advanced programmable SIM cards for 5G networks that comply with 3GPP R16 SA specifications.
Key 5G and 4G Products:
- Programmable 5G NR R16 SA SIM Cards
- 5G SA 128K SIM Cards with SUCI support
- 4G LTE / WCDMA Blank Cards for multi-mode testing
- IoT / Evaluation SIM Cards optimized for smart meters, tracking, and sensors
- Multi-network 4G VoLTE SIM Cards tested across global carriers
These cards are suitable for both commercial operators and private 4G/5G network deployments.
3. Form Factors and Memory Options
HKCARD offers flexible form factors and memory capacities to meet different device requirements.
Available Form Factors:
- 2FF (Standard SIM), 3FF (Micro SIM), 4FF (Nano USIM)
- Triple-cut combo cards for universal compatibility
Memory Sizes:
- 128K SIM / 128K USIM – Ideal for IoT and evaluation use
- 256K SIM – Suitable for richer file systems and basic Java applets
- 512K SIM – Recommended for multi-application and multi-profile deployments
4. White Label, Blank, and Special Variants
We provide a wide range of SIM types to support various business models:
- White SIM Cards / White Label SIM Cards – Fully blank cards ready for custom branding and MVNO use
- Blank SIM Cards / Empty SIM Cards – No preloaded operator data, ideal for full personalization
- Dummy SIM Cards – Used for device fitting and retail demonstration
- CDMA / RUIM / UIM Cards – For CDMA and multi-mode devices
5. Sysmocom Compatibility and Open-Source Support
HKCARD offers high-quality, cost-effective alternatives to popular Sysmocom products. Our cards are compatible with:
- sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5
- pySim and other PC/SC programming tools
- Open-source platforms such as Open5GS and srsRAN
Customers benefit from better product availability, shorter lead times, and competitive pricing compared to original Sysmocom cards.
Why Choose HKCARD ELECTRONICS CO., LIMITED?
- Over 10 years of experience as a professional SIM card manufacturer
- Sysmocom-compatible and pySim-ready products
- Re-programmable (not one-time burn) SIM cards
- Strong support for white label MVNO SIM cards and IoT SIM cards
- Fast lead times and reliable global shipping
Contact HKCARD ELECTRONICS CO., LIMITED
For inquiries about programmable SIM cards, writable IMSI SIM cards, blank SIM cards, or 5G SA SIM cards, please contact our team.
HKCARD ELECTRONICS CO., LIMITED
📧 Email: byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp / WeChat: +86 158 1737 2512
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