However, mobile phones will not be included in the system because they have too many signal emissions that can substantially affect the electronic systems on an aircraft, Zhang said, noting that the company has been exploring techniques that will enable mobile phones to operate on board.
Air China began developing its in-flight Internet system in early 2011, according to Zhang. He said the system passed CAAC safety and airborne compatibility tests, and the safety of the aircraft will not be compromised if the in-flight Internet system is hacked, although the possibility of that is "very slim". The service will begin only after the jetliner is at an altitude of more than 3,000 meters, so it will not be available during takeoff and landing, Zhang said.
The current narrowband access can allow up to 80 passengers to use the Internet simultaneously, he added.
Passengers said they are looking forward to the service.
"I noticed some people sitting in the front seats were updating their micro blogs and I hope I can use this service as soon as possible," said Guo Chao, a Beijing white-collar worker on board the flight. "But I want to know whether I can use it for free or have to pay."
Zhang said, "As far as I know, we don't have plans to charge passengers for this service, but what comes next depends on its development."
Questions:
1. What was tested on a recent Air China flight?
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