As a SLF who travels on a regular basis, i do not agree with allowing any form of mobile phones on planes, especially medium to long haul. Even allowing sms'ing would be annoying. Nothing worse then hearing someone shouting down the phone "Yes, i arrive in ten hours time as i'm on a plane", or those annoying sms tones, dot dot dot dash dash dash dot dot dot (think that's the standard Nokia one), and the such like, whilst trying to get some shut eye.
Cheers