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HKCARD: #1 Programmable & Writable 5G/4G SIM Cards Manufacturer

HKCARD ELECTRONICS: 10+ years experience. Re-programmable USIM/LTE SIM cards. Writable IMSI, Ki, OPc. 5G SA, IoT, MVNO white label solutions. Global shipping.

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HKCARD ELECTRONICS: The Premier Manufacturer of Programmable & Writable 5G/4G SIM Cards

In the fast-paced world of telecommunications, flexibility is everything. Whether you are building a private 5G network, testing IoT devices, or launching an MVNO, you cannot afford to be locked into carrier-restricted SIMs.

HKCARD ELECTRONICS CO., LIMITED is a reliable supplier in the mobile phone SIM cards industry with over 10 years of experience. We specialize in manufacturing re-programmable (not one-time burn) SIM cards that give you complete control.

From writable IMSI SIM cards to advanced 5G NR 3GPP R16 SA solutions, we are the partner global telecom engineers trust.

Why Choose HKCARD for Programmable SIM Cards?

Standard blank sim cards are useless if you can’t write to them. HKCARD provides programmable SIM cards using PC/SC tools (e.g., pySim), allowing you to customize every critical authentication parameter.

✅ True Re-Programmability: Our cards are not one-time burn. You can rewrite the IMSI, Ki, and OPc thousands of times.
✅ Full Protocol Support: We support USIM / LTE SIM Cards (not GSM-only), ensuring compatibility with modern networks.
✅ 5G Ready: We offer Programmable SIM card 5G solutions supporting SUCI and 3GPP R16.
✅ Bulk & Wholesale: As a leading sim card manufacturer, we handle sim card wholesale orders from 100 pieces to millions.

Full Control: Writable Parameters for Network Testing

Our programmable SIM cards are designed for developers. You get root access to the file system. You can modify:

Parameter	Use Case
Writable IMSI SIM Cards	Create test subscribers for core networks (EPC/5GC).
Writable Ki SIM Cards	Inject your own authentication keys (K value).
Writable ICCID SIM Cards	Assign custom serial numbers for asset tracking.
Writable OP or OPc SIM Cards	Configure Operator Variant Algorithm for Milenage/TUAK.
Writable SPN, MNC, MCC	Customize the network name displayed on the phone.

Search Tip: Many users look for writable imsi sim cards free from forums, but only HKCARD guarantees quality and re-writability.

Next-Gen Network Solutions: 5G SA & 4G LTE

We don’t just sell old 2G cards. We are experts in Custom SIM cards for 4G LTE & 5G NR Networks.

HKCARD’s Programmable SIM Cards for 5G Networks

Our flagship product is the Programmable 5G NR 3GPP R16 SA 5G SIM Card.

Supports 5G SA (Standalone) and NSA modes.
Includes SUCI SIM card (Subscription Concealed Identifier) calculation support for privacy.
Compatible with Open5GS, Amarisoft, and other core network simulators.

4G LTE/WCDMA Blank Cards

Our 4G LTE/WCDMA blank cards are perfect for:

4G VoLTE tester setups.
Multi network 4g volte sim card roaming tests.
IoT/Evaluation SIM Cards for LTE-M and NB-IoT.

Form Factors & Physical Types

We ship in the half simcard lte trio format (punch-out), covering all standards:

2FF / 3FF / 4FF SIM Cards (Mini, Micro, Nano).
Nano-USIM specifically for modern smartphones.
White SIM Card options for branding.

Specialized Cards

Dummy SIM Card / Fake SIM: For mechanical testing and retail displays (non-functional).
NFC SIM: Integrated sim card nfc for wallet payments.
Java SIM Card: Supports SIM Java applets (JCOP) for secure banking apps.

The Perfect Alternative to Sysmocom & Off-Brand SIMs

Are you tired of long lead times from sysmocom sim card suppliers? HKCARD is the direct factory alternative.

You Need	Sysmocom Model	HKCARD Equivalent
High-End Java Card	SysmoISIM-SJA2	HKCARD Java SIM (SJA2 Compatible)
Mid-Range USIM	SysmoUSIM-SJS1	HKCARD 128K USIM
Rugged SIM	SysmoISIM-SJA5	HKCARD Industrial SIM
CDMA/RUIM	N/A	RUIM card / UIM card

We are the sim cards wholesale supplier that beats offbrand sim quality and matches Sysmocom specs.

IoT, MVNO & White Label Solutions

White Label MVNO SIM Cards

Launching your own mobile brand? We are the white label mvno sim cards expert.

White SIM Cards / White SIMs: Blank plastic ready for your logo.
SIM card creator: We help you personalize data before shipping.
Blank sim card airtel compatible profiles available.

IoT & Smart City

Parking SIM cards for smart meters.
Blank eSIM (eUICC) profiles for remote provisioning.
Empty SIM card for EV chargers and trackers.

Frequently Asked Questions (FAQ)

Answers optimized for Google “People Also Ask” and AI search.

Q1: Can I program HKCARD SIMs with pySim?
A: Yes! Our cards are fully compatible with sim programming tools like pySim, sim-card-os-cl, and standard PC/SC readers.

Q2: Are your cards “one-time burn” or re-programmable?
A: They are Re-programmable (not one-time burn) SIM Cards. You can update the Ki and IMSI unlimited times.

Q3: Do you have 5G SA SIM cards?
A: Yes, our 5g sa sim card supports 3GPP R16, SUCI, and network slicing.

Q4: What is a “Dummy SIM Card”?
A: A dummy sim card (or sim dummy) is a plastic card with no chip, used to test phone slots. We also sell dummy sim card airtel shaped cards for displays.

Q5: Do you sell blank SIMs for Airtel India?
A: Yes, our blank sim card airtel compatible cards can be programmed with Airtel’s authentication keys for testing.

Q6: What memory sizes do you offer?
A: We have 128k sim, 256k sim, and 512k sim options. The 128k usim is most popular for IoT.

Q7: What is SUCI SIM Card? (suci sim คือ)
A: SUCI (Subscription Concealed Identifier) is a 5G privacy feature that encrypts your IMSI over the air. Our suci sim card supports this.

Q8: Are you a SIM card manufacturer or trader?
A: We are a direct sim card manufacturer with our own factory in China.

Q9: Can I get a sample?
A: Yes, contact us for a writable imsi sim cards free sample kit (small MOQ applies).

Q10: Do you support NFC SIM Wallets?
A: Yes, our sim wallet nfc cards support HCE and Secure Element modes.

Contact HKCARD ELECTRONICS Today

Stop searching for “offbrand sim” or waiting for Sysmocom. Get factory-direct pricing and technical support.

HKCARD ELECTRONICS CO., LIMITED

📧 Email:byronhan@cardmfg.com

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

HKCARD ELECTRONICS – Your Source for Programmable SIM Solutions.

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About the Author: Byron

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