Trusted Supplier of Writable SIM USIM Cards | 4G VoLTE ISIM Cards — HKCARD ELECTRONICS CO., LIMITED
HKCARD is a professional supplier of writable & programmable 4G LTE SIM/USIM cards and smart card readers. Serving telecom industry partners for over 10 years. Contact us today for bulk SIM solutions!
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HKCARD – Your Trusted Supplier for Programmable 4G LTE SIM / USIM Cards & SIM Card Readers
Over a Decade of Excellence in the Mobile Phone SIM Card Industry
HKCARD, operated by KCARD ELECTRONICS CO., LIMITED, is a highly experienced and professional supplier in the mobile phone SIM card industry. With over 10 years of expertise, HKCARD has established itself as a trusted name in supplying high-quality blank, writable, and programmable 4G VoLTE ISIM and USIM cards.
Whether you’re looking for reliable SIM card solutions for mobile testing, telecom operations, or development purposes, our factory-grade, customizable SIM products serve the most demanding needs in the GSM, WCDMA, FDD-LTE and VoLTE 4G/5G communication ecosystems.
Our Best-Selling SIM & USIM Card Products
We offer a wide selection of high-performance SIM/USIM cards and programmable solutions, compatible with all form factors and telecom environments:
🔹 Writable Programmable 4G LTE Blank SIM Cards
- 100pcs/lot Writable Programmable USIM Card 4G LTE WCDMA GSM
- Nano/Micro SIM USIM all-in-one (2FF/3FF/4FF)
- Compatible with voice/data testing, operator customization, telecom simulation
🔹 VoLTE ISIM Cards for Telecom Operators
- Blank 4G VoLTE ISIM USIM Cards with 128K capacity
- Programmable ICCID | IMSI | ADM | KI | OPC | OP
- Used for telecom lab simulations and BSS/OSS testing
🔹 SIM Card Testing Tools and Readers
- HID Omnikey 3121 Smart Card Reader USB 2.0 Desktop Model
- Supports SIM card reading/writing/programming
- Compatible with 2G, 3G, 4G, and 5G LTE modules
- SIM Programmer Software (4.1.5 Ver) included for advanced carrier-level simulations
🔹 3-in-1 SIM Form Factor Solutions
- 2FF/3FF/4FF SIM sizes supported in one card
- Ideal for developers and device testing teams
🔹 Mobile Use and Network Compatibility
- Compatible with WCDMA, GSM, LTE, VoLTE, and 5G protocols
- Works with mobile phones, SIM testers, network modules
Applications Across Telecom, Testing, and Development
HKCARD products are widely used in:
- Mobile phone testing
- SIM card application development
- Telecom provider equipment simulation
- R&D labs
- IoT device & LTE module testing
- Carrier-level software validation
Whether you’re an operator, engineer, developer or IoT brand, HKCARD ensures you have access to precise programmable SIM technology tailored to your needs.
Why Choose HKCARD as Your SIM/USIM Supplier
- ✅ 10+ Years of global shipping and manufacturing experience
- ✅ Direct Factory Supply – Full quality control
- ✅ Worldwide shipping – Europe, US, Asia, Middle East
- ✅ Fast lead times – Professional OEM/ODM service
- ✅ Technical support & software included
Customer satisfaction and long-term cooperation are our core values.
Contact HKCARD – Let’s Discuss Your Project
Looking for bulk orders of programmable SIM/USIM cards or need a supplier who can deliver consistently high quality at scale?
👉 Get in touch with HKCARD today to request a quote or free sample for testing!
HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
H2: Frequently Asked Questions (FAQs)
Q1: What is a programmable SIM or USIM card?
A programmable SIM allows modification of key parameters like IMSI, KI, and ICCID for testing or telecom simulation purposes.
Q2: Are HKCARD’s SIMs globally compatible?
Yes, our SIM/USIM cards support WCDMA, GSM, FDD-LTE, VoLTE, and are suitable for global telecom systems.
Q3: Can I write to these SIM cards myself?
Yes, using our SIM card programmer and included software, you can program data into the card with user-defined parameters.
Q4: Do you include SIM writing software with your products?
Yes! We provide the latest SIM Programmer Software 4.1.5 with full support for 2G to 5G programming.
Q5: What form factors are supported?
Our SIM cards support Mini (2FF), Micro (3FF), and Nano (4FF) sizes using 3-in-1 punchable cards.
Q6: Are your SIM cards writable multiple times?
Yes. All SIM/USIM cards are rewritable, enabling multiple trials and tests.
Q7: Do you support OEM/ODM services?
Yes! We offer custom branding, data configuration, and packaging services for enterprise clients.
Q8: What is the capacity of your SIM cards?
Our most popular SIMs are 128K, suitable for almost all operator-grade functions.
Q9: Are your SIMs tested for telecom-grade compatibility?
Absolutely. All cards undergo stringent quality and network compatibility tests before shipment.
Q10: Can these SIMs be used for IoT or M2M applications?
Yes. Many clients use our USIMs in IoT modules, telemetry devices, smart meters, and 4G routers.
- Best Wholesale Source for Blank Programmable 4G LTE USIM Cards – HKCARD
- Buy Writable SIM, USIM, ISIM Cards for VoLTE GSM LTE WCDMA Networks
- Top Factory for Smart SIM Card Solutions – 100pcs/lot Sim Cards in Bulk
- Trusted VoLTE USIM Card Manufacturer – GSM/WCDMA/LTE/VoLTE Support
- 4G LTE SIM Programmers with Card Readers and SIM Editing Software
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HKCARD ELECTRONICS CO., LIMITED
📧 Email:byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512
