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In the modern telecommunications landscape, operators and network engineers require flexible, secure, and reliable smart card solutions for network deployment and device testing. HKCARD ELECTRONICS CO.,LIMITED, a leading manufacturer based in Mainland China, provides top-tier Writable Blank 4G VoLTE ISIM/USIM Cards specifically designed for telecom operators, network setup, and mobile device integration.

Whether you are provisioning small mobile 4G devices or executing daily telecom operations, our blank ISIM/USIM cards deliver the storage, compatibility, and security required for seamless cellular connectivity.

Broad Network Compatibility and Security

To ensure uninterrupted communication across multiple telecom standards, our 4G VoLTE SIM cards are fully compatible with 4G FDD LTE, WCDMA, and GSM networks.

At the core of the card’s security architecture is the Milenage algorithm, the industry-standard cryptographic protocol used for secure authentication in mobile networks. Additionally, the Card Operating System (COS) is already installed, saving telecom engineers valuable time during the programming and deployment phases.

Technical Specifications and Memory Storage

Engineered for optimal performance, these SIM cards securely store subscriber information, network data, and authentication keys.

  • Product Type: Writable Blank 4G VoLTE ISIM/USIM Card (LTE SIM Card)
  • Chip Memory: 128k, providing ample space for subscriber profiles, contacts, and SMS storage.
  • Algorithm: Milenage
  • Operating System: COS already installed
  • Certifications: CE and FCC certified, guaranteeing compliance with strict European and US regulatory and safety standards.

Physical Dimensions and 3-in-1 Flexibility

Our SIM cards are manufactured using premium, durable PVC material. To provide maximum flexibility for different generations of mobile hardware, they feature a convenient 3-in-1 plug-in design:

  • Card Body Dimensions: 85.6 mm × 54 mm (Standard CR80 size)
  • SIM Plug-In Size: 25 mm × 15 mm
  • Form Factors: Easily snaps out into Standard (2FF), Micro (3FF), and Nano (4FF) SIM sizes, allowing for universal installation in any compatible mobile device.
  • Thickness: Ranges from 0.30mm to 0.84mm, adhering to strict ISO smart card standards.

Application and Usage Guidelines

These writable blank 4G SIM cards are the ideal choice for telecom operators managing daily network operations, conducting mobile device setups, and configuring small mobile 4G hardware.

Care Instructions: To maintain the longevity and data integrity of the 128k chip, users should store and operate the SIM cards with care. Please avoid exposing the cards to extreme high temperatures or excessive moisture, as this can damage the internal PVC construction and microchip.

Partner with HKCARD ELECTRONICS CO.,LIMITED

When telecom operators need reliable, certified, and programmable USIM technology, they trust HKCARD ELECTRONICS CO.,LIMITED. We specialize in providing high-quality smart card solutions tailored to the rigorous demands of the global telecommunications industry.

Contact us today for bulk orders, technical specifications, and custom telecom solutions: