The head of the U.S. Federal Communications Commission is holding off on revising the rules governing the right of small wireless phone carriers to "roam" on the networks of larger rivals, reports Reuters.

At issue is whether carriers should be allowed to roam in areas where they own airwaves, but have not built networks.

Kevin Martin, chairman of the FCC, had proposed guaranteeing that carriers who owned unused spectrum could continue roaming for four years before they lost roaming rights. However, he withdrew the proposal before a meeting of the FCC's five commissioners because they had not reached an agreement on the issue.

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