Writable SIM Cards: The Future-Proof Connectivity Solution for Global Telecom

Discover HKCARD’s advanced writable SIM cards for 3G, 4G, and LTE networks. Customizable, secure, and compatible with IoT, M2M, and global telecom deployments.

1. The Power of Programmable SIM Technology

HKCARD specializes in writable SIM cards that empower telecom operators and IoT developers with unparalleled flexibility. Our portfolio includes:

① 3G SIM Card Writable

• Supports legacy 3G network configurations
• Dynamic carrier profile switching for roaming optimization3
• Memory: 64KB–256KB (OTA-updatable via Java platform)

② 4G SIM Card Writable

• Dual APN support for IoT/M2M segmentation
• MIL-STD-810G certified (operational range: -40°C to 105°C)
• Pre-loaded with 6 carrier profiles for multi-region deployment

③ LTE SIM Card Writable

• Embedded eSIM (eUICC) capabilities for remote provisioning4
• AES-256 encryption for secure data transmission
• Compatible with 5G NSA/SA networks

writable sim card, 3g sim card writable, 4g sim card writable,LTE sim card writable,writable sim cards

2. Technical Specifications & Advantages

Key Benefits of Writable SIM Cards:
✔ Bulk Programming: Compatible with CH341A programmers and custom scripts2
✔ Anti-Cloning Protection: Unique ICCID/IMSI pairing
✔ Cross-Platform Support: Works with MCT tools, Android/iOS SDKs8

3. Industry Applications

IoT/M2M Solutions

• Fleet management: Reprogram SIMs remotely for global logistics
• Smart meters: Update APN settings without physical access

Telecom Operators

• Reduce SIM inventory costs with multi-profile writable cards
• White-label solutions for MVNOs

Device Manufacturers

• Pre-configure test SIMs for QA processes
• Embed HKCARD SDK for OTA management2

4. Why HKCARD Stands Out

✓ 18+ Years Expertise

• ISO 9001 & GSMA SAS-UP certified production facilities
• 98% compatibility rate with global carriers

✓ Customization Options

• Branding: Custom logos, packaging, and chip printing
• Technical: Adjust memory allocation, APN rules, and security protocols

✓ Global Support

• 24/7 engineering assistance for SIM programming8
• MOQ: 500pcs with volume discounts

5. FAQs

Q: How to program 4G SIM card writable batches?
A: We provide:

1. Pre-configured master SIMs for cloning
2. Python/Java APIs for automated provisioning2
3. Technical documentation for CH341A tools

Q: Are your LTE SIMs eSIM-ready?
A: Yes – all LTE SIM card writable models support GSMA RSP v3.2 for eUICC migration.

writable sim card,

3g sim card writable,

4g sim card writable,

LTE sim card writable,

writable sim cards

Best Regards

Byron

HKCARD ELECTRONICS CO.,LIMITED

Whatsapp/wechat:+8615817372512

Skype：byron1681

Email：byronhan@cardmfg.com