UTIM (Universal Thing Identity Module or Universal Thing Identification Module). UTIM is an integrated circuit that is intended to securely store cryptographic methods and secrets, which are used to identify and authenticate connected devices, IoT devices or smart devices in a network. Network examples are: GSM, LPWAN, NB-IoT and many others. UTIM cards are always used in Internet of Things and its’ various applications; as connected vehicles, robots, connected sensors, wearables, IP-cameras, VR, AR, headsets etc.

The UTIM circuit card is part of the function of a Universal Integrated Circuit Card (UICC) - physical smart card, which is usually made of PVC with embedded contacts and semiconductors. UTIM cards are embedded in different connected and IoT devices. Typical form factor for UTIM is MMF2 smart card, but it can be even smaller, implemented smaller in form factor of QNF6 card.

A UTIM card contains unique serial number, usually it also contains a method of self-personalization procedure of Security Elements to generate secrets, but it also can be personalised as a normal SIM card with pre-shared secrets as IMSI, KI and OPC.

The main difference between UTIM and SIM card is in the field of application: main field of UTIM card application is autonomous IoT and connected devices while SIM card is applied for subscribers using devices in a certain operator network, but there can be exceptions. UTIM card in many cases is cheaper than SIM card and has different business logic, oriented on IoT applications mainly.
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