SIM card connector series is a well-known integrated circuit module which mainly used to store the International Mobile Subscriber Identity (IMSI) securely, and its related key to identifying subscribers on mobile devices. Sim card format has been shrunk gradually because the design tends to be miniature and portable, the result is the development of Micro SIM, Mini-SIM, and the Nano-SIM. ATTEND offers multiple selections, including push-push, push-pull, hinge, bar push, holder, and eject type. Most of them are also featured in stability, durability and a wide range of operating temperatures as a perfect tracking solution for embedded and industrial systems.