Cellphones and Wi-Fi in the Aircrafts.Ιs that so safe?

If you’ve flown with a commercial airline, you know the drill. Turn off all pagers, electronic games, MP3 and CD players, laptops and the like once the cabin door is closed, until the plane gets above 10,000 feet. No using cell phones at any time while the plane is in the air. But do you know the real reasons why you have to follow these rules? (keep it)
Although a number a major airlines have gone to great pains in offering Wi-Fi connectivity on their flights, few passengers are buying. USA Today says that "some analysts" estimate that on-board Wi-Fi adoption tops out at around 10-percent of a given plane's passengers.
A business traveler on Austrian Airlines boards a flight from Vienna to Warsaw and, once airborne, he opens his IBM ThinkPad notebook computer and connects to the Boeing 767 aircraft's wireless fidelity network.He sends e-mail and surfs the Web, keeping in contact with colleagues throughout Europe.
Is this so safe for our flights?
It was revealed on 29 October that parcels containing a powdered explosive packed in laser printer cartridges had travelled undetected on aircraft to the UK and to Dubai in the UAE. A cellphone connected to a detonation circuit could have allowed a terrorist to trigger an explosion by calling or texting the phone.
The long-awaited ability to use a cellphone or Wi-Fi connection on an aircraft might become a casualty of the latest aviation security threat.
Wi-fi in aircrafts Working with a system called Connexion, developed by Boeing's business unit, Austrian Airlines will be among the first European carriers to offer in-flight Internet service to its passengers.
As i have already mentionted the electronics devices is not safe for our flight because
There are still unknowns about the radio signals that portable electronic devices (PEDs) and cell phones give off. These signals, especially in large quantities and emitted over a long time, may unintentionally affect aircraft communications, navigation, flight control and electronic equipment.
Federal Aviation Administration regulations prohibit use of most portable electronic devices aboard aircraft, but they specifically exempt portable voice recorders, hearing aids, heart pacemakers and electric shavers because they don’t give off signals that might interfere with aircraft systems.
Since 1991, the Federal Communications Commission (FCC) has banned the inflight use of 800 MHz cell phones because of potential interference with ground networks. This ban requires that in addition to the testing the FAA requires to show non-interference to the airplane systems, an airline would also need to apply for an exemption to the FCC rule before it could allow cell phone use inflight. The FCC proposed modifying this ban in 2004, but subsequently withdrew the proposal based on the comments it received.
It is not yet known whether the cellphones in the printer bombs were intended to be triggered remotely. They may have been intended simply as timers, as in the 2004 Madrid train bombings. But future devices could take advantage of wireless communication.
"If it were to be possible to transmit directly from the ground to a plane over the sea, that would be scary," says Alford's colleague, company founder Sidney Alford. "Or if a passenger could use a cellphone to transmit to the hold of the aeroplane he is in, he could become a very effective suicide bomber."
Manufacturers of the technologies will not welcome this fresh security concern, having finally gained airworthiness approval for their in-flight cellphone and Wi-Fi systems by proving that their microwave transmissions do not interfere with avionics.
Both the UK government and the US Department of Homeland Security are looking into the technology behind in-flight cellphone and Wi-Fi connections to determine whether it could be used in conjunction with bomb trigger mechanisms, according to New Scientist. It's possible they will conclude that cellphones and Wi-Fi connections are no longer allowed on planes.
The ink cartridge bombs discovered on several flights in recent days contained SIM cards and circuitry which may have been intended to serve as a trigger mechanism. The electronics in the bombs shipped from Yemen are merely timers, and could not have been used as call-activated triggers due to the technological limitations posed by distance and altitude, but it's not impossible. Terrorists could not have used a regular cellphone to call an airplane-borne bomb because it probably wouldn't be able to reach a tower that could bounce the signal properly.
That being said, in-flight Wi-Fi gives them more options, such as Voice over Internet Protocol (VoIP), for contacting a device on an aircraft. Alternatively, suicide bombers could possibly call a bomb in the luggage compartment of the plane. Other experts argue that "the use of mobile phones on planes does not constitute any additional security threat."
Foiled terrorist plots often end with stricter security procedures, but cellphone use and in-flight Wi-Fi are arguably much more important to us in today's society than not being able to bring fake pocket knives on board. Hopefully, security experts will figure out a way to keep the bad guys at bay while the good guys can continue to enjoy the luxuries of the modern world.

Axilleasdisaster.