What is the SIM OVERLAY card sticker? Also known as film card, film SIM and SIM smart card, a high-security chip is made into an ultra-thin SIM card using a semiconductor packaging process, which is directly attached to the original SIM card; it can be applied to mobile phones Banking, mobile e-wallet and mobile device security component solutions, etc.; CHILITAG provides solution standard products, customized development and packaging foundry production services; CHILITAG product advantages: 1. Smart card core technology, provide customized applications, 2 . Semiconductor group experience, advanced packaging technology, 3. Competitive product prices, strict quality requirements, 4. Successful product sales records in worldwide.