HKCARD – Custom, Programmable & Writable SIM Cards for 5G, 4G & IoT
Discover HKCARD’s comprehensive range of programmable, writable and blank SIM cards for 5G, 4G LTE, IoT & more. Compatible with Sysmocom, pySim & open-source stacks.
Introduction
HKCARD ELECTRONICS CO.,LIMITED is a trusted supplier in the mobile phone SIM cards industry with over 10 years of experience. We specialize in providing a wide range of SIM card solutions, including programmable, writable and blank SIM cards for 5G, 4G LTE, IoT and evaluation labs. Our products are designed to be fully compatible with Sysmocom, pySim and popular open-source LTE/5G stacks, making us a reliable alternative for customers seeking better availability and competitive pricing.
Our Product Range
Writable SIM Cards
- Writable IMSI SIM Cards for testing and provisioning
- Writable Ki SIM Cards and Writable ICCID SIM Cards for authentication and network routing
- Writable OP/OPc SIM Cards, Writable KEY SIM Cards, Writable SPN SIM Cards and Writable MNC/MCCSIM Cards for easy re-programming of authentication, service-profile and country-code elements
- Re-programmable (not one-time burn) SIM Cards for iterative development and research labs
Programmable SIM Cards
All our SIM cards can be programmed using PC/SC tools like pySim, allowing for fast and transparent programming processes.
5G-Ready SIM Cards USIM / LTE SIM Cards (not GSM-only) supporting 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 in various capacities (128K, 256K, 512K) and form factors (2FF, 3FF, 4FF)
Blank & Evaluation SIM Cards
- 4G LTE/WCDMA blank cards and IoT/Evaluation SIM Cards for rapid prototyping
- White-label MVNO SIM cards, fake SIMs, blank SIM cards, sysmocom SIM cards and other Sysmocom-compatible options
Compatibility with Sysmocom, pySim and Open-Source Tools
HKCARD’s SIM cards are fully compatible with:
- Sysmocom ecosystems (sysmoISIM-SJA2, sysmoUSIM-SJS1, SJA2)
- pySim and other PC/SC based sim programming tools
- Open-source stacks for LTE/5G, including Open5GS, srsRAN and USIM test solution environments
If you are currently relying on sysmocom products, HKCARD can provide form-, function- and file-system-compatible alternatives with better availability and pricing.
FAQ
Q1: What is a writable IMSI SIM card?
A1: A writable IMSI SIM card allows the IMSI value to be reprogrammed after manufacturing, ideal for network testing and dynamic user management.
Q2: Do your SIM cards support 5G networks?
A2: Yes, we offer programmable 5G NR 3GPP R16 SA SIM Cards for next-gen standalone 5G networks.
Q3: Are your SIM cards compatible with Sysmocom?
A3: Absolutely, our SIM cards are fully compatible with Sysmocom tools like pySim and hardware (SJA2, SJS1, SJA5).
Q4: What form factors do you offer?
A4: We provide 2FF, 3FF, 4FF, nano-USIM and blank eSIM cards in capacities from 128K to 512K.
Q5: Can I get blank or dummy SIM cards?
A5: Yes, we supply blank SIM cards, dummy SIMs and fake SIMs for prototyping or testing.
Q6: Do you support pySim and open-source tools?
A6: Yes, our SIM cards are pre-verified for use with pySim, Open5GS, srsRAN and other open-source platforms.
Q7: What is the difference between reprogrammable and one-time burn SIMs?
A7: Reprogrammable SIM cards can be updated multiple times, while one-time burn SIMs are fixed after initial programming.
Q8: Do you offer custom-branded SIM cards?
A8: Yes, we provide white-label MVNO SIMs, offbrand SIMs and fully customized designs for enterprises.
Q9: Are your SIMs suitable for IoT applications?
A9: Definitely, our IoT/Evaluation SIM Cards and programmable 4G/5G SIMs support remote management and global connectivity.
Q10: How quickly can I get my order?
A10: Most orders ship within 24–48 hours. Contact us at byronhan@cardmfg.com for urgent requests.
- Get 5G-Ready SIM Cards with HKCARD: Customizable, Reprogrammable & Sysmocom-Compatible
- Blank SIM Cards for 4G, 5G, IoT & Evaluation – Fast Global Delivery from HKCARD
- Why Choose HKCARD Over Sysmocom? Better Pricing, Same Compatibility
- 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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- 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
Contact Us
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
Let HKCARD be your partner for reliable, flexible and future-proof SIM card technology.
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