The Subscriber Identity Module (SIM) remains one of the most critical components in modern telecommunications. As networks evolve toward 5G NR and 4G LTE, the demand for programmable SIM cards and writable SIM cards continues to grow among telecom operators, MVNOs, IoT developers, research labs, and system integrators.
HKCARD ELECTRONICS CO., LIMITED is a leading global manufacturer specializing in writable IMSI SIM cards, re-programmable SIM cards, and Sysmocom-compatible SIM cards. With over 15 years of experience, HKCARD delivers high-quality, ISO-certified solutions that support full customization of IMSI, Ki, ICCID, OP/OPc, and other essential parameters.
1. Comprehensive Range of Writable and Re-Programmable SIM Cards
HKCARD offers a complete portfolio of programmable SIM cards that allow users to write and rewrite critical data multiple times. These cards are fully compatible with pySim and other PC/SC programming tools.
Supported Writable Parameters:
- Writable IMSI SIM Cards – Customize International Mobile Subscriber Identity
- Writable Ki SIM Cards – Edit authentication keys
- Writable ICCID SIM Cards – Modify Integrated Circuit Card ID
- Writable OP/OPc SIM Cards – Configure operator variant algorithms
- Writable MCC/MNC SIM Cards – Set country and network codes
- Writable SPN SIM Cards – Customize Service Provider Name
All re-programmable SIM cards from HKCARD support multiple write cycles, making them ideal for testing, development, and private network deployments.
2. 5G NR and 4G LTE Leadership
HKCARD provides advanced programmable SIM cards for 5G networks that fully comply with 3GPP R16 SA 5G specifications.
Key 5G and 4G Solutions:
- Programmable 5G NR R16 SA SIM Cards
- SUCI SIM Cards for secure identity concealment
- 128K, 256K, and 512K USIM Cards with multiple memory options
- 4G LTE / WCDMA Blank Cards for multi-mode devices
- IoT and Evaluation SIM Cards for prototype testing
- NFC SIM Cards and SIM Wallet NFC support for contactless applications
These solutions are designed to meet the requirements of both commercial operators and private 4G/5G network deployments.
3. Form Factors and Physical Options
HKCARD offers flexible form factors to suit various devices and applications:
- 2FF (Standard SIM), 3FF (Micro SIM), 4FF (Nano USIM)
- Triple-cut Combo Cards for universal compatibility
- White SIM Cards and White Label SIM Cards for OEM branding
- Blank SIM Cards / Empty SIM Cards / SIM Blank for full customization
- Dummy SIM Cards and engineering test cards
- Java SIM Cards for applet deployment
- UIM / RUIM / CDMA SIM Cards for dual-mode devices
4. Sysmocom Compatibility and Open-Source Integration
HKCARD provides high-quality, cost-effective alternatives to popular Sysmocom products. Our cards are designed to be fully compatible with:
- sysmoISIM-SJA2 (sysmoisim-sja2, SJA2)
- sysmoUSIM-SJS1 (sysmousim-sjs1)
- sysmoISIM-SJA5 (sysmoisim-sja5)
Compatible Tools and Platforms:
- pySim and other PC/SC SIM programming tools
- Open-source stacks such as Open5GS and srsRAN
- University and laboratory USIM testing environments
HKCARD offers better product availability, shorter lead times, and competitive pricing compared to traditional Sysmocom options.
5. Quality Assurance and Why Choose HKCARD
HKCARD ELECTRONICS CO., LIMITED manufactures all products under ISO 9001:2015 and ETSI/3GPP standards. Our global supply chain supports bulk SIM exports to over 60 countries.
Key Advantages:
- 15+ years of industry experience
- Sysmocom-compatible and pySim-ready cards
- Re-programmable multi-cycle SIM cards
- Fast lead time and OEM branding support
- Technical assistance for Open5GS and srsRAN setups
- Competitive pricing for both small and bulk orders
Contact HKCARD ELECTRONICS CO., LIMITED
For inquiries about programmable SIM cards, writable IMSI SIM cards, blank SIM cards, or Sysmocom-compatible solutions, please contact our team.
HKCARD ELECTRONICS CO., LIMITED
📧 Email: byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp / WeChat: +86 158 1737 2512
Your reliable global partner for writable, re-programmable, and future-ready SIM card solutions.
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