The Federal Communications Commission will propose allowing passengers to use their cellphones on airplanes, people familiar with the matter said. While phone use would still be restricted during takeoff and landing, the proposal would lift an FCC ban on airborne calls and cellular data use by passengers once a flight reaches 10,000 feet, an FCC official said. The move comes just weeks after the Federal Aviation Administration said it would allow expanded use of electronic devices during flights, as technical concerns about the airborne use of gadgets fade. Yet it promises to raise a vigorous debate about the social merits of allowing people to make phone calls amid a captive audience at close quarters. The proposal is scheduled to be discussed at the commission’s December meeting. If implemented, it would then be up to the airlines to decide whether to allow voice calls.