About HKCARD ELECTRONICS CO., LIMITED
When we started out over ten years ago, the goal was straightforward: build SIM cards that actually work the way engineers need them to. No shortcuts, no generic solutions. HKCARD ELECTRONICS CO., LIMITED has grown into a trusted OEM SIM Supplier serving mobile network operators, IoT developers, device manufacturers, and enterprise IT teams across more than 50 countries.
We handle everything in-house — from SIM card design and chip selection through to SIM personalization and final quality inspection. If you have ever struggled to find a supplier who genuinely understands the difference between a Milenage authentication SIM and a TUAK variant, or who can deliver properly programmed writable IMSI SIM cards without a steep learning curve, you already know why clients keep coming back to us.
Milenage & TUAK Algorithm SIM Cards — Built for Real Network Security
Authentication is not an area where you want to cut corners. Every Milenage Algorithm SIM card we produce is fully compliant with 3GPP TS 35.205/206 specifications, and our production line supports both legacy and next-generation authentication schemes.
What we supply:
- Milenage algorithm SIM cards — standard LTE/4G authentication, widely deployed by MNOs worldwide
- Milenage/TUAK authentication SIM cards — dual-algorithm support for networks transitioning toward 5G security frameworks
- Milenage authentication SIM cards — hardened configurations with customizable Ki, OP, and OPc values
- SIM Security Test cards — pre-configured units for lab validation before live deployment
A note on search terms: we frequently receive inquiries for “Mileage Algorithm SIM” — if that brought you here, you are in the right place. It is simply an alternative spelling that finds its way into purchasing queries.
Every card ships only after passing our internal SIM Security Test protocol. That means authentication handshakes are verified, key storage is confirmed intact, and the card profile matches the order specification exactly.
VoLTE & IMS SIM Cards — HD Voice Testing Made Practical
Getting VoLTE right in the lab before going live on a network is non-negotiable. A poorly configured IMS stack wastes days of engineer time. HKCARD produces VoLTE ISIM cards that are ready to use with major IMS core platforms and test equipment straight out of the packaging.
Our VoLTE product range:
| Product | Primary Use Case |
|---|---|
| VoLTE ISIM Cards | Commercial IMS deployment |
| VoLTE Test SIM Cards | Laboratory R&D and protocol validation |
| VoLTE Testing SIM Cards | Device certification and carrier acceptance testing |
| VoLTE SIM Karte | European market configurations |
These cards carry the correct EF_ISIM file structure and support standard IMS Private Identity (IMPI) and IMS Public Identity (IMPU) parameters. If your test bench runs on a Rohde & Schwarz CMW500, an Anritsu MD8475, or similar platforms, our VoLTE test SIMs integrate without additional configuration headaches.
Writable & Programmable SIM Cards — Full Parameter Control
This is where HKCARD genuinely differs from commodity SIM vendors. Our writable programmable SIM technology gives engineers and network administrators direct control over the parameters that matter most, without waiting on a manufacturer to re-personalize a batch.
Writable parameters we support:
- Writable IMSI SIM Cards — change the IMSI value to match any target network profile
- Writable Ki SIM Cards — update authentication keys for iterative security testing
- Writable OP / OPc SIM Cards — operator-specific customization for Milenage derivation
- Writable ICCID SIM Cards — unique card identification for inventory and traceability
- Writable SPN, MNC, and MCC — network branding and roaming configuration
Programming tools included:
We do not just sell the card and leave you to figure out the rest. Every writable SIM card OEM order can be paired with:
- SIM Card Programmer hardware
- SIM Card Reader Writer units
- SIM Programming Software with a clean GUI
- SIM Personalize Tools for batch processing
Our SIM personalization service is also available for clients who prefer to receive cards pre-loaded and ready for immediate deployment.
Private 5G & Enterprise Network SIM Solutions
Industrial IoT, smart manufacturing, port automation, underground mining operations — these environments share a common requirement: connectivity that nobody else can touch. Public network SIMs simply do not belong in a private LTE or 5G core.
HKCARD has been supplying private network SIM cards to enterprise customers since the early days of CBRS deployments in the US and neutral-host private LTE in Europe. We understand what a private 5G SIM needs to carry in terms of PLMN configuration, APN settings, and authentication parameters to work reliably with popular open-source and commercial 5G core platforms.
Private network SIM capabilities:
- Private 5G SIM cards — low-latency, high-reliability configurations for industrial automation
- Private Network SIM Card Solutions — tailored PLMN profiles for corporate campuses and smart factories
- Open Source SIM compatibility — tested with Osmocom, srsRAN, Open5GS, and free5GC
- Custom IMSI ranges for isolated network identification
- Support for network slicing parameters in 5G SA deployments
If your team is building a private network and needs SIM cards that will actually authenticate against your self-hosted HSS or UDM without trial and error, talk to us before you finalize your core network configuration. We have seen most of the common pitfalls and can save your engineers real time.
SIM Card Manufacturing & Wholesale — Global Reach, Consistent Quality
HKCARD controls the full production process. That matters when you are ordering tens of thousands of cards for an MNO rollout and cannot afford a personalization error at scale.
Manufacturing highlights:
- SIM JAVA 128K — sufficient applet storage for multi-service SIM applications
- SIM NFC / SIM SWP — contactless payment and near-field communication support
- SIM Card Personalization — bulk IMSI, ICCID, and key loading with verification
- Whole SIM Card production runs from prototype quantities up to multi-million unit orders
- SIM Card Africa / SIM Africa — dedicated logistics and regional compliance support for African MNOs and MVNOs
We have worked with operators launching greenfield networks in West Africa, established carriers upgrading from 3G to 4G in East Africa, and MVNO entrants across Sub-Saharan markets. If SIM Card Africa supply chains are part of your project, we have the regional experience to back it up.
Frequently Asked Questions
Who exactly is HKCARD ELECTRONICS CO., LIMITED?
We are a Hong Kong-based OEM SIM manufacturer with over ten years of production experience. We work directly with MNOs, IoT platform companies, private network integrators, and device makers — no middlemen involved.
Can you produce Milenage/TUAK dual-algorithm SIM cards?
Yes. Our Milenage/TUAK authentication SIM cards support both algorithms simultaneously, which is particularly useful for networks running mixed 4G/5G authentication policies.
What is the minimum order quantity for writable IMSI SIM cards?
MOQ depends on the specific configuration. We accommodate small R&D batches as well as large commercial runs. Contact us with your requirement and we will give you a straight answer.
Do your VoLTE test SIM cards work with CMW500?
Yes. Our VoLTE ISIM cards have been validated on CMW500 setups as well as Anritsu and Keysight test platforms.
What open-source 5G cores are your private network SIMs compatible with?
We have tested with Open5GS, free5GC, srsRAN, and Osmocom. If you are running a different stack, share the HSS/UDM configuration requirements and we can confirm compatibility before your order.
Do you support the African telecoms market?
Absolutely. SIM Card Africa is a significant part of our wholesale business. We handle regional frequency band configurations, local regulatory documentation support, and efficient shipping logistics.
What programming software comes with writable SIM cards?
We supply our own SIM Programming Software alongside compatible SIM Card Programmer hardware. The software covers IMSI, Ki, OPc, ICCID, SPN, MNC, and MCC fields with batch processing capability.
How do I place an OEM order?
Reach out directly via WhatsApp, email, or Skype with your technical specification. We will respond within one business day with a quote and lead time.
Contact HKCARD ELECTRONICS CO., LIMITED
We prefer direct conversations over long email chains. If you know what you need, tell us. If you are still working out the specification, we are happy to help you get there.
📱 WhatsApp / WeChat: +86 158 1737 2512
💬 Skype / Teams: byron1681
📧 Email: byronhan@cardmfg.com