No quality airline should allow the use of cell phones in flight because it presents a nuisance for fellow travellers! If some LCC's need the extra revenue and/or need to lure young very important consultant kids to fill their planes, ok.
Imagine a business cabin full of Italians ( or any other heavy communicating nation ) constantly using their phones on a night flight and you can clearly imagine this horror scenarion. Contrary to AI pilots I need my good sleep in flight mode and be fit on arrival.