HKCARD – Custom, Programmable & Writable SIM Cards for 5G, 4G LTE & IoT
HKCARD offers writable IMSI, Ki, OP/OPc, SPN, MNC/MCCSIM, re‑programmable and blank SIM cards for 5G NR R16 SA, 4G LTE/WCDMA, IoT and evaluation labs. Fully compatible with Sysmocom, pySim and open‑source LTE/5G stacks. 10+ years of experience.
1. About HKCARD
HKCARD ELECTRONICS CO.,LIMITED is a trusted supplier in the mobile phone SIM cards industry with over a decade of experience. We provide a full portfolio of custom, writable, re‑programmable and blank SIM cards that meet the needs of operators, MVNOs, IoT developers and research labs worldwide.
2. Products
2.1 Writable & Re‑programmable SIM Cards (H3)
| Feature | Description |
|---|---|
| Writable IMSI SIM Cards | Re‑program the IMSI for testing, provisioning and dynamic user management. |
| Writable Ki SIM Cards | Update Ki values for authentication and network security. |
| Writable ICCID SIM Cards | Change ICCID for carrier and billing integration. |
| Writable OP/OPc SIM Cards | Re‑program OP/OPc for secure authentication. |
| Writable KEY SIM Cards | Update cryptographic keys on demand. |
| Writable SPN SIM Cards | Modify Service Provider Name for branding. |
| Writable MNC/MCCSIM Cards | Adjust Mobile Network Code and Mobile Country Code. |
| Re‑programmable (not one‑time burn) SIM Cards | Multiple updates for labs, pilots and iterative development. |
2.2 Programmable SIM Cards (H3)
All HKCARD SIMs can be programmed via PC/SC tools such as pySim, enabling fast, transparent, and repeatable programming workflows.
2.3 5G‑Ready & 4G LTE SIM Cards (H3)
| Category | Details |
|---|---|
| USIM / LTE SIM Cards | Not GSM‑only; support VoLTE, WCDMA and 4G data. |
| Programmable 5G NR 3GPP R16 SA SIM Cards | Designed for next‑generation standalone 5G networks. |
| Custom SIM Cards for 4G LTE & 5G NR Networks | 128 K, 256 K or 512 K memory; 2FF, 3FF, 4FF form factors. |
| Programmable 5G NR 3GPP R16 SA 5G SIM Card | Full SA‑R16 compliance for commercial roll‑out. |
2.4 Blank & Evaluation SIM Cards
| Type | Use‑case |
|---|---|
| 4G LTE/WCDMA Blank Cards | Rapid prototyping and field trials. |
| IoT/Evaluation SIM Cards | Remote provisioning, OTA updates, global connectivity. |
| Blank eSIM | Remote activation via SM‑DP+ servers. |
| White‑label MVNO SIM Cards | Custom branding for MVNOs. |
| Fake / Dummy / Blank SIM Cards | Testing, placeholder use, lab environments. |
| Sysmocom‑compatible SIMs (sysmoISIM‑SJA2, sysmoUSIM‑SJS1, sysmoISIM‑SJA5, SJA2) | Seamless migration from Sysmocom. |
2.5 Specialty & Niche SIMs
- NFC SIM, SIM wallet NFC, SIM card nfc – for contactless payments and secure access.
- Parking SIM, 4G VoLTE tester, TD SIM – for specialized industry use.
- Off‑brand SIM, white sim, white sims – cost‑effective bulk solutions.
- SIM card creator, sim programming, custom SIM card – tools for developers.
- SIM card wholesale, sim card suppliers, sim card wholesale supplier – B2B distribution.
3. Compatibility with Sysmocom, pySim & Open‑Source Tools
HKCARD’s SIM cards are engineered to work smoothly with:
- Sysmocom (sysmoISIM‑SJA2, sysmoUSIM‑SJS1, sysmoISIM‑SJA5, SJA2)
- pySim and other PC/SC based programming tools
- Open‑source LTE/5G stacks (Open5GS, srsRAN, OpenBTS)
- USIM test solution environments in labs and universities
If you currently rely on Sysmocom products, HKCARD can provide form‑, function‑ and file‑system‑compatible alternatives with better availability and competitive pricing.
4. Frequently Asked Questions
| # | Question | Answer |
|---|---|---|
| 1 | What is a writable IMSI SIM card? | A SIM that allows the IMSI to be re‑programmed after manufacturing, ideal for testing and dynamic provisioning. |
| 2 | Do your SIM cards support 5G? | Yes – we supply programmable 5G NR 3GPP R16 SA SIM cards for standalone 5G networks. |
| 3 | Are your SIMs compatible with Sysmocom? | Absolutely – our SIMs match Sysmocom’s file structure and can be programmed with pySim. |
| 4 | Which form factors are available? | 2FF, 3FF, 4FF, nano‑USIM, blank eSIM, and custom sizes from 128 K to 512 K. |
| 5 | Can I order blank or dummy SIM cards? | Yes – we stock blank SIM cards, dummy SIMs, fake SIMs, and Sysmocom‑compatible variants. |
| 6 | Do you support pySim and open‑source tools? | Yes – our SIMs are pre‑tested with pySim, Open5GS, srsRAN and other open‑source platforms. |
| 7 | What is the difference between re‑programmable and one‑time‑burn SIMs? | Re‑programmable SIMs can be updated multiple times; one‑time‑burn SIMs are fixed after the first write. |
| 8 | Do you offer custom‑branded SIM cards? | Yes – white‑label MVNO SIMs, off‑brand SIMs, and fully customized designs are available. |
| 9 | Are your SIMs suitable for IoT? | Definitely – our IoT/Evaluation SIM cards support remote provisioning, OTA updates and global connectivity. |
| 10 | How fast can I receive an order? | Most orders ship within 24–48 hours. Contact sales@hkcard.com for urgent requests. |
- Get 5G‑Ready SIM Cards with HKCARD: Customizable, Re‑programmable & Sysmocom‑Compatible
- Blank SIM Cards for 4G, 5G, IoT & Evaluation – Fast Global Delivery from HKCARD
- Why Choose HKCARD Over Sysmocom? Better Pricing
- Programmable SIM Cards for Open‑Source 5G Networks – HKCARD Solutions
- Bulk SIM Card Supplier: White‑Label, Custom & Blank Options from HKCARD
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7.
- HKCARD Electronics – Custom 5G NR SIM Cards compatible with Sysmocom and pySim
- Writable IMSI and Ki SIM Cards from HKCARD – programmable SIM solutions for labs and MVNOs
9. Conclusion
HKCARD ELECTRONICS CO.,LIMITED is your one‑stop partner for writable, re‑programmable, blank and custom SIM cards that meet the demands of 5G, 4G LTE, IoT and evaluation environments. With a proven track record, Sysmocom‑compatible designs, and seamless integration with pySim and open‑source LTE/5G stacks, we deliver reliable, cost‑effective solutions that help you stay ahead of the curve.
Ready to upgrade your SIM card supply chain?
Contact us today for a quote, sample order or technical consultation.
10. Contact Us
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
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