Federal Communications Commission Chairman Julius Genachowski said the agency was looking for ways to make more airwaves available for next-generation wireless networks, underscoring the expanding need sparked by the growing use of iPhones and similar devices. Mr. Genachowski's recently announced plan to impose open Internet rules — which would prevent carriers from deliberately slowing or blocking some traffic in their efforts to manage their networks — on wireless networks and devices. The FCC has proposed that any Internet provider — whether wireless, cable or DSL — be barred from blocking or slowing access to Internet services such as video or phone.

“I believe firmly in the need for the FCC to preserve Internet openness, whether a person accesses the Internet from a desktop computer or a wireless laptop or netbook,” Mr. Genachowski said.