Programmable & Writable SIM Cards | 5G NR & 4G LTE | HKCARD Electronics – Sysmocom Compatible
HKCARD Electronics supplies writable and re‑programmable SIM cards (IMSI, Ki, ICCID, OP/OPc) for 4G LTE & 5G NR networks. Sysmocom‑compatible, pySim‑ready, ISO‑certified manufacturer with 15+ years’ experience.
programmable-sim-cards-5g-4g-hkcard
HKCARD – World‑Leading Manufacturer of Writable and Programmable SIM Cards
Expertise That Powers Connectivity
For more than fifteen years, HKCARD ELECTRONICS CO., LIMITED has been a cornerstone of the mobile phone SIM cards industry, delivering programmable SIM cards, writable IMSI SIM cards, and custom SIM card solutions across telecom operators, MVNOs, IoT developers, laboratories, and research institutions.
Our consistent quality, open‑standard design, and deep compatibility with pySim and Sysmocom tools make HKCARD a globally trusted partner for advanced 4G LTE and 5G NR network solutions.
Comprehensive Range of Writable and Re‑Programmable SIM Cards
H3 | Configurable Network Parameters
HKCARD’s product family supports full programmability of:
- Writable IMSI SIM Cards – Custom International Mobile Subscriber Identity
- Writable Ki SIM Cards – Authentication key editing
- Writable ICCID SIM Cards – Integrated Circuit Card ID customization
- Writable OP or OPc SIM Cards – Operator variant/OP algorithm configuration
- Writable KEY SIM Cards & Writable SPN SIM Cards – Crypto & Service Provider Name fields
- Writable MCC SIM Cards & Writable MNC SIM Cards – Country & Network codes
These re‑programmable SIM cards (not one‑time burn) allow flexible rewriting using standard tools such as pySim or any PC/SC‑compatible reader.
5G and 4G LTE Leadership
Future‑Ready 5G NR Solutions
HKCARD builds programmable SIM cards for 5G networks that fully comply with 3GPP R16 SA 5G specifications:
- Programmable 5G NR 3GPP R16 SA 5G SIM Card
- Custom SIM cards for 4G LTE & 5G NR Networks
- 5G SA 128K SIM Card and SUCI SIM Card for secure identity concealment
- NFC SIM and SIM wallet NFC support for contactless transactions
4G LTE & USIM Solutions
- USIM/LTE SIM Cards (not GSM‑only)
- 4G LTE/WCDMA blank cards for multi‑mode devices
- IoT/Evaluation SIM Cards for prototype connectivity
- 128K USIM, 256K SIM, 512K SIM – multiple memory options
- Multi‑network 4G VoLTE SIM card tested on global carriers
Form Factors and Physical Options
Available Form Factors: 2FF / 3FF / 4FF (Nano‑USIM)
We also offer triple‑cut combo cards for universal use.
Other variants include:
- White SIM Card and White Label SIM Cards (OEM branding)
- Blank SIM Cards / Empty SIM Cards / SIM Blank for customization
- Dummy SIM Card, Fake SIM, and engineering SIM Dummy for testing
- UIM Card, RUIM Card, CDMA SIM Card for CDMA & dual‑mode devices
- Java SIM Card / SIM Java for applet deployment
Sysmocom Compatibility & Open‑Source Integration
Drop‑In Alternative to Sysmocom SIM Cards
HKCARD offers form‑, file‑system‑, and function‑level compatible alternatives to:
- sysmoISIM‑SJA2 (sysmoisim‑sja2, SJA2)
- sysmoUSIM‑SJS1 (sysmousim‑sjs1)
- sysmoISIM‑SJA5 (sysmoisim‑sja5)
Compatible with:
- pySim & other PC/SC SIM programming tools
- Open‑source stacks such as Open5GS, srsRAN
- USIM test solution environments in labs and universities
Advantages: better product availability, shorter lead times, and globally competitive pricing.
Specialized SIM Card Solutions
- White label MVNO SIM Cards for mobile operators
- Blank eSIM for embedded designs
- NFC SIM for contactless applications
- IoT & M2M connectivity modules
- SIM Card Creator & SIM Programming Services for custom deployments
Quality Assurance and Supply Chain Reliability
HKCARD manufactures under ISO 9001:2015 and ETSI/3GPP standards, ensuring consistent quality and long‑term device compatibility.
Our global logistics capability supports bulk SIM exports to over 60 countries for telecom carriers, MVNOs, and OEM partners.
Why Choose HKCARD
✅ 15 + years industry experience
✅ Sysmocom‑compatible and pySim‑ready
✅ Re‑programmable multi‑cycle SIM cards
✅ Fast lead time and OEM branding
✅ Technical support for Open5GS / srsRAN setups
Frequently Asked Questions (FAQ)
Q1. Can I rewrite IMSI, Ki, and OP values multiple times?
Yes – our re‑programmable SIM cards (not one‑time burn) allow safe rewrites for network testing and private LTE/5G setups.
Q2. Are HKCARD cards compatible with Sysmocom tools?
Absolutely. They mirror sysmoISIM‑SJA2/SJS1/SJA5 functionality and operate seamlessly with pySim and PC/SC interfaces.
Q3. What form factors do you supply?
2FF (standard), 3FF (micro), 4FF (nano‑USIM), and combo trio formats.
Q4. Do you support 5G SA?
Yes. Our Programmable 5G NR R16 SA SIM Cards handle SUCI encryption and standalone core testing.
Q5. What memory options are available?
128 K, 256 K, and 512 K depending on applet requirements.
Q6. Can I order blank SIM cards?
Yes, we supply blank SIM and white SIM cards for full personalization.
Q7. Which software can program HKCARD SIMs?
pySim, SIM personalize tools, and other PC/SC software.
Q8. Do you offer NFC SIM and SIM wallet solutions?
Yes; NFC functions integrate for payments and secure ID applications.
Q9. What is your minimum order?
Standard MOQ ≈ 100 units for testing; bulk discounts begin at 1,000+.
Q10. Are HKCARD SIM cards used by universities and labs?
Yes, they’re widely used in Open5GS, srsRAN, and R&D environments for LTE/5G evaluation.
Contact HKCARD
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
Partner with HKCARD – your global source for writable, re‑programmable, and Sysmocom‑compatible SIM cards.
- “Sysmocom Alternative SIM Cards – HKCARD’s Writable 5G & 4G Solutions for Developers”
- “Re‑Programmable SIM Cards for Open5GS & srsRAN Testing – HKCARD Electronics”
- “Writable IMSI and Ki SIM Cards – Flexible LTE/5G Development with pySim”
- “White Label MVNO and IoT SIM Cards from HKCARD Electronics”
- “Blank & Custom USIM Cards Wholesale – 128K to 512K Memory Options”
#ProgrammableSIMCards #WritableIMSI #5GSIM #HKCARD #SysmocomCompatible #pySim #USIM #BlankSIM #IoTSIM #SIMCardManufacturer
HKCARD programmable SIM cards in 2FF‑3FF‑4FF form factors showing writable IMSI, Ki, ICCID fields for 4G LTE and 5G NR networks.
Sysmocom‑compatible blank white USIM cards from HKCARD Electronics for pySim programming and Open5GS/srsRAN testing.
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
HKCARD ELECTRONICS CO., LIMITED – Supplying the world with reliable, re‑programmable, and future‑ready SIM card solutions.
