F.C.C. to Weigh Allowing Cellphone Use on Flights WASHINGTON - The Federal Communications Commission said on Thursday that it would consider changing its rules to permit the use of cellphones and other wireless-data devices during airline flights. If approved, the change is certain to delight some passengers but frustrate many others. Any change, which was placed on the agenda for the commission's Dec. 12 meeting, is still months away, requiring a public comment period of weeks and a final draft of the rules. But it would constitute a major shift for airline passengers. The use of cellphones during flights has been vigorously opposed by many passengers and by flight attendants, although some airlines in Asia and Europe already offer cell service. In the United States, the flight attendants union immediately urged the F.C.C. not to proceed with the proposal. An F.C.C. official said airlines in the United States would be given the option of outfitting their planes with equipment that would allow the use of cellphones once a plane climbed above 10,000 feet, but the airlines would not be required to provide the service. Tom Wheeler, the F.C.C. chairman, said the new rules, if adopted, would "expand consumer access and choice for in-flight mobile broadband," meaning the commission thinks both Wi-Fi and wireless cellphone data plans could be used. "Modern technologies can deliver mobile services in the air safely and reliably, and the time is right to review our outdated and restrictive rules," Mr. Wheeler said in a statement. I look forward to working closely with my colleagues, the F.A.A. and the airline industry on this review of new mobile opportunities for consumers. A swift negative reaction came from the Association of Flight Attendants, a union representing airline workers. "Flight attendants, as first responders and the last line of defense in our nation's aviation system, understand the importance of maintaining a calm cabin environment," the union said in a statement. Any situation that is loud, divisive and possibly disruptive is not only unwelcome but also unsafe. The union said polls and surveys conducted over many years found that "a vast majority of the traveling public wants to keep the ban on voice calls in the aircraft cabin." "In far too many operational scenarios, passengers making phone calls could extend beyond a mere nuisance, creating negative effects on aviation safety and security that are great and far too risky," the union said. Several airlines already provide in-flight Wi-Fi service, enabling passengers to use the Internet, email and text messaging. The F.C.C. measure would allow voice calls through the use of what is called a picocell, a small cellular base station that would be installed on a plane, collect all cellphone activity during the flight and send it down to the ground. Airlines in the United States already have the technical ability to allow in-flight phone calls using voice connections over an onboard Wi-Fi network, but so far none have done so. It is all but certain that vast waves of airline passengers in the United States will tell the F.C.C. their feelings about the proposal. Last month, the Federal Aviation Administration changed the rules to permit airlines to allow the use of electronics during takeoff and landing, and passengers generally rejoiced at the ability to be able to read an e-book or play a game on their tablet or smartphone. But sitting next to someone who is chatting away for hours could quickly outweigh the common complaint of sitting next to a crying baby for the duration of a flight. "I don't want to have to sit next to someone who is talking on their phone the entire flight," said Greg Pritikin, a screenwriter who lives in Los Angeles. That would be a nightmare. On Twitter, people also complained about the potential new rule. "Really bummed to hear that news," wrote Randi Zuckerberg, author of the book "Dot Complicated" (and sister of Mark Zuckerberg of Facebook). Airplanes were the last socially acceptable place to require people to unplug. The F.C.C. proposal would permit calls and data connections, which would allow people to surf the web on their smartphones and other devices. Airlines and a number of companies, including Gogo, have spent millions of dollars outfitting planes with Wi-Fi connections, and that business could suffer with the allowance of cellphone traffic. But Steve Nolan, a spokesman for Gogo, said the company's business would not be affected by the change. It already has the ability to provide in-flight phone service through its Wi-Fi connections, he said, but the commercial airlines have not permitted it so far. Gogo provides the service on some private jets. If the F.C.C. approved the use of the cellphone equipment on airlines, the F.A.A. would still have to permit the equipment installation to ensure it did not affect passenger safety, officials said. If the F.C.C. goes ahead with its plan on Dec. 12, it will solicit public suggestions on the proposed new rule. After reviewing the comments, the commissioners will decide whether to approve the new regulations, either as proposed or with revisions. The initiative comes less than three weeks after Mr. Wheeler took over as chairman of the F.C.C., but it has been in the works for months, agency officials said.