Originally Posted by
jpsj
Do all other airlines follow the same procedure?
Yes.
US policy states
Internet is available once you're above 10,000 feet – listen for the flight attendant's announcement.
https://www.usairways.com/en-US/trav...eair/wifi.html
DL policy states
Keep your e-readers, tablets, and smartphones in airplane mode from gate to gate and continue enjoying Wi-Fi above 10,000 feet.
http://www.delta.com/content/www/en_...echnology.html
Also, this article states:
Gogo’s air-to-ground Wi-Fi system, used by Air Canada, AirTran Airways, Alaska Airlines, American Airlines, Delta Air Lines, Frontier Airlines, United Airlines, US Airways, and Virgin America, is currently engineered to start working at 10,000 feet and that won’t be changing anytime soon, says Gogo spokesperson Steve Nolan.
http://skift.com/2013/10/31/in-fligh...ow-10000-feet/