Small cells play a pivotal role in bringing huge amount of data capacity, where it is needed the most, by brining network closer to users. Small cells are already popular among mobile operators. But to reach 1000x capacity, we need much more of them, everywhere—indoors, at homes, offices, enterprises, shopping malls etc., and in outdoors, at busy intersections, stadiums etc. And we need in all the familiar flavors—3G, 4G, Wi-Fi (often all integrated in a single box)—in all the different forms, including: user installed small cells, operator installed picos, metros, relays, remote radio heads, distributed antenna systems, etc. For such dense heterogeneous networks, the key is to make sure interference is managed and there by the overall network capacity is increased. Thanks to the already developed interference management techniques, the overall network capacity scales with the degree of densification of small cells. We are now focused on developing enhancements that take the performance even further.