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Mobile-phone "courtesy" signal/features

Standard signal to disable audible ringer while other features remain active
  (+6, -1)
(+6, -1)
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Some places in various countries are installing mobile-phone jammers. Although ringing cell phones can certainly be a nuisance, the jammers are an over-reaching "solution" to the problem and may cause serious problems which could dwarf the minor ones they stifle.

I would suggest that a better approach would be to standardize a cell-phone "courtesy" signal which, unless overridden, would cause suitably-equipped cell phones to disable the audible ringer while keeping other features (vibrate, messaging, etc.) active.

Additionally, I would like cell phones to provide a button which would answer the call with a message that the holder of the phone would be taking the call shortly. This would allow someone who was e.g. in a movie theater when the baby-sitter called to discretely leave the auditorium before having to take the call [anyone who thought they might have to take a call would, of course, be asked to seat themselves along the aisles near the back of the theater].

These features could thus avoid much of the 'social annoyance' associated with cell-phones without reducing their usefulness for emergencies, family and otherwise.

supercat, Oct 16 2004

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       I was just searching pre-post for exactly what you've got in para. 2. Thank you, and bun.
lurch, Mar 23 2008
  

       Yesterday on the freeway I found myself fantsizing about a mobile cellphone jammer, which would hopefully increase safety in the area around me.   

       Then I realized it would probably only increase the volume of dropped calls and people redialing in my vicinity.
normzone, Mar 23 2008
  
      
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