All that nonsense you've heard about in-flight mobile phone usage turning into a big old nuisance has NOT come to pass.
Key quote from Ryanair chief Michael O'Leary:
"We've thus far had no complaints of any passengers who are annoyed by their cathedral-like sanctity of a Ryanair flight being besmirched by somebody on a mobile call."
But sure haven't I been telling you this all along? Here is O'Leary on the subject.