In this paper, we present an advanced load balancing algorithm for Evolved Packet System utilizing different radio interfaces. By using the fact that Evolved Packet Core can support, in addition to LTE also multiple other packet data technologies, such as WLAN, we can utilize this additional dimension for benefit of load balancing for future mobile broadband networks. The main goal of the algorithm is to minimize the number of unsatisfied users in the network and thus load balancing algorithm is only active if those are present. We show a significant performance boost in network resource utilization and average data rate per user when employing the algorithm.