What is GUTI (globally unique temporary identifier)?

GUTI recognizes cell phones to lte network. The GUTI is allotted to the device by the Mobility Management Entity (MME), the access network’s primary control node. It has two fragments: Globally Unique Mobility Management Entity Identifier (GUMMEI), which recognizes the network, and the M-TMSI, which recognizes the device. Every GUTI must be unique, and networks utilize various conventions to stay away from duplication of numbers.