HKCARD ELECTRONICS CO., LIMITED supplies rewritable (re-editable) multi-function USIM cards designed for legitimate telecom use cases such as core network testing, base station testing, device verification, and lab validation. These cards are widely used by R&D teams, test labs, and integrators working on 5G NSA (Non-Standalone), 4G LTE, and 3G interoperability and performance evaluation.
Our product line includes Telecom USIM cards, Communication USIM cards, multi-mode ISIM cards, and standard SIM cards, with options suitable for multi-network and multi-application testing needs.
What Is a SIM / USIM / ISIM Card?
- SIM stands for Subscriber Identity Module. It is a smart card that stores subscriber identity data, security keys, and (optionally) contacts or service data used for network authentication and encrypted communication in GSM/2G environments.
- USIM is used for UMTS/3G and LTE/4G, offering enhanced security and applications compared to classic SIM.
- ISIM is commonly used for IP Multimedia Subsystem (IMS) services (often relevant for VoLTE/VoWiFi and advanced service authentication), depending on the network and project requirements.
For telecom testing, a rewritable USIM/ISIM can help engineers update configurations, profiles, or test parameters efficiently (subject to your system authorization and compliance requirements).
Key Features (Testing-Oriented)
- Rewritable / editable card profile support for repeated testing workflows
- Designed for core network and base station testing scenarios, including 5G NSA environments
- Multi-mode support (USIM/UIM combinations available depending on project)
- Helps streamline lab work such as device compatibility checks, regression tests, and QA validation
Network Compatibility (Common China Market Use Cases)
Depending on your required profile and configuration, solutions can support scenarios such as:
- China Mobile 4G LTE USIM
- China Unicom 3G USIM
- China Telecom 3G RUIM and 4G LTE USIM/UIM multi-mode cards
If you share your target network technology (2G/3G/4G/5G NSA), form factor, and testing environment, HKCARD can recommend an appropriate card type.
Memory, OS, and Value-Added Applications
- 64K / 128K user space options (typical configurations for many test deployments)
- Supports Native and JAVA smart card operating systems (project-dependent)
- Can support value-added services such as STK applications (e.g., enhanced phonebook features, service menus), based on your specification
Note: SIM capacity is often described in ranges such as 8K/16K/32K/64K, and larger capacities (e.g., 128K, 256K, 512K and above) may be available for specific multifunction STK/app scenarios.
SIM Card Sizes (Form Factors)
SIM/USIM cards are available in multiple standard sizes:
- ID-1 (Full-size card body): 85.6 × 53.98 mm (carrier card body for punch-out formats)
- 2FF (Mini SIM): 25 × 15 mm
- 3FF (Micro SIM): 15 × 12 mm
- 4FF (Nano SIM): 12.3 × 8.8 mm
HKCARD can provide the form factor that best fits your devices, modules, or test fixtures.
Contact HKCARD ELECTRONICS CO., LIMITED
HKCARD ELECTRONICS CO., LIMITED
📧 Email: byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp / WeChat: +86 158 1737 2512
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