Mobile phone calls up in the air

It seems that the stories we've been told about cell phones interfering with aircraft navigation equipment may not be entirely true. Otherwise, why would Emirates be looking to introduce calls on their planes in the new year? You won't be able to use your phone while the plane is landing, taking off, or ascending or descending during flight - but once above 6850m (or 20,000ft) and steady - you'll be good to go. But will they have a special section for people wishing to use their phones mid-flight and loudly proclaim "I'm on the plane …"? And will there be a rule about the type and volume of ringtones that are allowed in-flight? And - if you flush someone's mobile phone down an aircraft toilet - will it be able to be retrieved, and if so, will it still work. (This is assuming the stories of toilet waste from planes being ejected, frozen, is not true. If it is … looks like someone on the ground might get a big surprise ... and a phone!)