HKCARD ELECTRONICS CO.,LIMITED manufactures SIM cards in 3-in-1 and 4-in-1 formats. These cards cover 2FF, 3FF and 4FF sizes so they fit most phones and devices. Each card has at least 128 KB of memory and works with LTE and VoLTE networks. HKCARD handles full personalization including IMSI, ICCID, Ki and OP/OPc values. The cards use MILENAGE authentication and support PIN, PUK and ADM codes. Production includes secure personalization, custom printing and packaging with barcodes or QR codes.

Versatile 3-in-1 and 4-in-1 SIM Card Formats

HKCARD produces cards that snap into 2FF (mini-SIM), 3FF (micro-SIM) and 4FF (nano-SIM) sizes. A 3-in-1 card gives operators and device makers one SKU that works across older and newer handsets. The 4-in-1 version adds the original full-size 1FF option when needed. Cards arrive pre-scored so the unused parts break away cleanly. This format reduces inventory and shipping costs while remaining compatible with standard SIM trays.

Memory Capacity and LTE/VoLTE Network Support

Every card from HKCARD ELECTRONICS CO.,LIMITED starts with a minimum of 128 KB EEPROM. That space holds the file system, phonebook, SMS storage and any extra applets required by the operator. The chips support LTE data and VoLTE voice, so they work on 4G networks without extra configuration. Cards pass standard interoperability tests and stay stable under normal temperature and voltage ranges.

Full Personalization with IMSI, ICCID, Ki and OP/OPc

HKCARD writes all required data during production. This includes the unique IMSI, ICCID, authentication key Ki and operator variant OP or OPc. Additional files such as SPN, PLMN lists or custom ADF entries can be added on request. Data is loaded in a controlled environment so each card matches the operator’s HLR/HSS records exactly. Batch reports and sample cards are supplied for verification before shipment.

MILENAGE Authentication plus PIN, PUK and ADM Control

The cards implement the 3GPP MILENAGE algorithm for mutual authentication. PIN1, PIN2, PUK1, PUK2 and ADM codes are set according to the customer’s specification. Retry counters and unblock procedures follow GSM/3GPP rules. Secure personalization takes place in an isolated area with access logs and dual-control procedures. Finished cards leave the factory with keys never exposed in clear text.

Custom Branding, Printing and Packaging

HKCARD prints logos, operator names or serial numbers directly on the card body using laser or thermal methods. Color, overlay and hologram options are available. Packaging can be bulk, blister or individual envelopes. Each pack or card carries the ICCID plus a matching barcode or QR code for warehouse scanning. Artwork files are checked and a physical proof is sent before mass production starts.

HKCARD ELECTRONICS CO.,LIMITED
📧 Email: byronhan@cardmfg.com
🌐 Website: https://www.cardmfg.com/
📱 WhatsApp / WeChat: +86 158 1737 2512

#SIMCards #3in1SIM #LTEVoLTE #SIMPersonalization #HKCARD