Kineto Wireless Inc., developer of software that lets mobile phones work on both cellular and Wi-Fi networks, brought in $15.5 million in fourth-round funding to advance the technology of wireless base stations -- known as femtocells -- which would expand home broadband coverage.

The new 3G and 4G femtocells would connect to customers' existing broadband service to infuse home zone coverage for smart phones, and could even bridge gaps between coverage areas.

The investment round included contributions from Motorola, Oak Investment Partners, Sutter Hill Ventures, Venrock, Seapoint Ventures and InterDigital Communications. In the past, Milpitas, Calif.-based Kineto has received funding from the 3i Group, Mitsui & Co. and Storm Ventures.