HKCARD ELECTRONICS: Writable IMSI/Ki/OPc SIM Cards | Programmable 5G NR, LTE, & Sysmocom Alternatives

HKCARD ELECTRONICS supplies re-programmable, writable IMSI/Ki/OPc SIM cards for 5G NR R16 SA, 4G LTE, and IoT. Fully compatible with pySim, Sysmocom (SJA2/SJS1), and open-source stacks (Open5GS, srsRAN). Bulk, white-label, and custom solutions available.

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HKCARD ELECTRONICS: The Reliable SIM Card Manufacturer for Writable IMSI, Programmable 5G/4G, and Sysmocom-Compatible Solutions

With over 15 years of experience in the mobile phone SIM cards industry, HKCARD ELECTRONICS CO., LIMITED is a trusted global supplier of re-programmable, writable SIM cards for 5G NR, 4G LTE, IoT, and MVNO deployments. Our SIM cards are designed for labs, universities, private operators, and enterprise IoT, with seamless integration into open-source LTE/5G stacks and Sysmocom-based test environments.

1. Writable & Re-Programmable SIM Cards (Not One-Time Burn)

HKCARD provides fully re-programmable SIM cards that allow engineers to modify and update key parameters using PC/SC tools such as pySim, sim personalize tools, and other SIM card creator utilities. These cards are ideal for USIM test solution environments, private 4G/5G networks, and MVNO provisioning.

Writable Parameters Include:

• Writable IMSI SIM Cards
• Writable IMSI SIM Cards (Free) – Searchable as “writable imsi sim cards free”
• Writable Ki SIM Cards
• Writable ICCID SIM Cards
• Writable OP or OPc SIM Cards
• Writable KEY SIM Cards
• Writable SPN SIM Cards
• Writable MNC SIM Cards
• Writable MCC SIM Cards

2. 5G & 4G Programmable SIM Cards

5G NR R16 SA SIM Cards

• Programmable 5G NR 3GPP R16 SA 5G SIM Card
• 5G SA 128k SIM and 5G SA SIM Card
• Custom SIM cards for 4G LTE & 5G NR Networks
• Blank eSIM for embedded SIM deployments

4G LTE/WCDMA Blank Cards

• USIM / LTE SIM Cards (not GSM-only)
• 4G LTE/WCDMA blank cards
• Multi-network 4G VoLTE SIM card
• 4G GSM SIM card for legacy device testing

IoT/Evaluation SIM Cards

• Blank SIM cards, dummy sim card, fake sim
• TD SIM, parking sim cards, 4G VoLTE tester

3. Available Form Factors

HKCARD offers SIM cards in all standard form factors:

• 2FF / 3FF / 4FF SIM Cards
• Nano-USIM, half simcard LTE trio, simcard half LTE
• White sim card, programmable sim card, sim dummy, empty sim card
• SA SIM card, CDMA SIM card, UIM card, RUIM card

4. Compatibility with Sysmocom, pySim, and Open-Source Tools

Many customers search for or use Sysmocom SIM cards, including:

• sysmocom SIM card / sysmocom SIM cards / sysmocom SIM
• sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5, SJA2

HKCARD offers compatible programmable SIM cards that work seamlessly with:

• pySim and other PC/SC-based SIM programming tools
• Open-source stacks for LTE/5G, including Open5GS, srsRAN, and similar setups
• USIM test solution environments in labs and universities

Looking for Sysmocom Alternatives?
Choose HKCARD’s Programmable Test SIM Cards for form-, function-, and file-system-compatible alternatives with better availability and competitive pricing.

5. White Label & Bulk SIM Cards

White Label MVNO SIM Cards

• Blank sim cards, white label sim cards, offbrand sim
• Custom printing, branding, and packaging
• Bulk sim orders with fast turnaround

Specialized Variants

• Blank sim card Airtel, dummy sim card Airtel
• 128k SIM, 256k SIM, 512k SIM
• White sim, white sims, USIM 4G, USIMLTE, 128k USIM, 128k USIM, 128k USIM

6. NFC & Secure SIM Solutions

• SIM card NFC, NFC SIM, SIM wallet NFC
• SIM cards near field communication market
• SUIC SIM card (5G privacy-enabled SIMs)
• SIM card creator tools for SIM programming

7. Java SIM & Custom SIM Cards

• Java SIM card, SIM Java, SIM programming
• Custom SIM card for 4G LTE & 5G NR Networks
• SIM card suppliers, SIM card wholesale, SIM cards wholesale supplier

8. Frequently Asked Questions (FAQ)

Q1: Are HKCARD SIM cards compatible with pySim?

A: Yes. Our programmable SIM cards are fully compatible with pySim and other PC/SC-based SIM programming tools.

Q2: Can I rewrite IMSI, Ki, OPc, ICCID multiple times?

A: Yes. Our re-programmable (not one-time burn) SIM cards allow multiple updates to IMSI, Ki, OPc, ICCID, and other parameters.

Q3: Do you offer 5G Standalone (SA) R16 SIM cards?

A: Yes. We offer Programmable 5G NR 3GPP R16 SA 5G SIM Cards and 5G SA 128k SIM options.

Q4: Are your SIM cards compatible with Sysmocom workflows?

A: Yes. HKCARD offers form-, function-, and file-system-compatible alternatives to Sysmocom SIM cards (e.g., sysmoISIM-SJA2, sysmoUSIM-SJS1, sysmoISIM-SJA5, SJA2).

Q5: Do you provide white label SIM cards for MVNOs?

A: Yes. We offer white label MVNO SIM cards, blank sim cards, and custom branding options.

Q6: What form factors are available?

A: We offer 2FF / 3FF / 4FF SIM Cards, including nano-USIM, half simcard LTE trio, and simcard half LTE.

Q7: Do you support NFC-enabled SIM cards?

A: Yes. We provide SIM card NFC, NFC SIM, and SIM wallet NFC for near field communication market applications.

Q8: Are your SIM cards suitable for IoT and embedded devices?

A: Yes. We offer blank eSIM, blank SIM cards, and evaluation SIM cards for IoT/Evaluation SIM Cards and embedded SIM use cases.

Q9: Do you offer Java SIM cards?

A: Yes. Our Java SIM cards support custom applets and SIM Java programming for advanced use cases.

Q10: What is the difference between HKCARD and Sysmocom SIM cards?

A: HKCARD offers form-, function-, and file-system-compatible alternatives to Sysmocom SIM cards with better availability, competitive pricing, and customization options.

1. HKCARD: Writable IMSI/Ki/OPc SIM Cards for 5G NR & LTE Networks
2. Programmable 5G NR 3GPP R16 SA SIM Cards | HKCARD ELECTRONICS
3. Sysmocom Alternatives: HKCARD’s Programmable Test SIM Cards
4. Blank & White Label SIM Cards for MVNOs | HKCARD ELECTRONICS
5. Re-Programmable SIM Cards Compatible with pySim & Open5GS

#HKCARDElectronics #ProgrammableSIM #5GSIM #SysmocomAlternative #pySim #Open5GS #BlankSIMCards #WhiteLabelSIM #SIMCardManufacturer #IoTSIMCards

1. HKCARD Programmable 5G NR R16 SA SIM Cards in 2FF/3FF/4FF Form Factors
2. Blank White Label MVNO SIM Cards from HKCARD ELECTRONICS

Contact HKCARD ELECTRONICS

Get a Quote Today

HKCARD ELECTRONICS CO., LIMITED

📧 Email:byronhan@cardmfg.com

🌐 Website: https://www.cardmfg.com/
📱 WhatsApp/Wechat: +8615817372512

Request samples or bulk pricing for your next 5G NR, 4G LTE, or IoT project today.