Why no transmission from 200+ mobile phones?
Making a cell phone call in a jet flying over 8000 ft is virtually impossible.
1) Doppler induced loss-of-service (no bars) occurs at relative speeds (aircraft to cell tower) of 150 kts (nautical miles per hour) and greater.
2) Cell antenna radiation pattern makes voice call almost impossible above 2000 ft and data exchange impossible above 8000 ft.