Mobile networks provide us communication with the rest of the world, being conversation with another person or connection to internet to search for informations. Historical overview of mobile networks from first to fourth generation gives us an overview on »evolution« of mobile networks. First standard that has been planned as an evolution was the UMTS (Universal Mobile Telecommunication System) network, which has evolved to LTE (Long Term Evolution) network as we know it today. Standard LTE and standard for core network EPC (Evolved Packet Core) are designed as standard for long-term evolution network. This thesis gives an overview of standardization for mobile networks and a more detailed description of LTE network, separately access part E-UTRAN (Evolved – Universal Terrestrial Radio Access Network) and core part EPC. Both parts are separately developing and complement each other. Thesis presents LTE Advanced standard, as the successor of LTE, which brings many new solutions and services. After that more detailed LTE Advanced innovations and imporvements are described, such as carrier aggregation, FD-MIMO (Full Dimension – Multiple Input Multiple Output) with usage for up to 64 antennas, the solution CoMP (Coordinated Multi Point transmission and reception) and Relay stations. Despite of slight delay the LTE standard is now dedicated to provide communication channel for IoT (Internet of Things) devices. LTE standard for IoT is called LTE-M (Long Term Evolution – Machine to Machine), which is part of the LTE Advanced-Pro solution. Thesis is also describing this standard and it introduces solutions for narrowband communications, which is almost as important as broadband communication in LTE network. Thesis also presents historical view of the LTE network implementation in Slovenia, which is still developing. As a conclusion the thesis describes the future of LTE networks and evolutionary transition to the next generation network.