REPLY: 2:280/5555 5cff5541   
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   TZUTC: 0300   
   Good ${greeting_time}, Michiel!   
      
   11 Jun 2019 09:08:12, you wrote to Richard Menedetter:   
      
    MV>>> I still don't see how one can have an IPv6 address on the end   
    MV>>> device if the "last mile" does not support IPv6, other than via a   
    MV>>> 6to4 tunnel with one of the tunnel end points on the end device.   
    RM>> IPv4 and/or IPv6 is tunneled in a GTP tunnel to your home provider.   
    RM>> It is unpacked there and handled as if you were in your home network.   
    MvdV> I think I am getting it now. I have always wondered why a device   
    MvdV> such as a dongle for a laptop that can not be used to make   
    MvdV> telephone calls, needs a telephone number.   
      
   All they need are two ughm... numbers: IMSI and Ki (ID and key).   
      
   However, the operators' billing systems are tied to a contract number:   
   1. one customer may have many phones (so passport data are non-unique);   
   2. the customer may require SIM card replacement (change IMSI and Ki);   
   3. the customer may want to change the number.   
      
    MvdV> Well... it looks like these mobile devices still use an equivalent   
    MvdV> of making a POTS modem call to the "ISP home gateway" to get on the   
    MvdV> internet... That is a revelation... ;-)   
      
   Very unlikely. But I can check that while being 400 km away from home.   
      
      
   --   
   Alexey V. Vissarionov aka Gremlin from Kremlin   
   gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii   
      
   ... that's why I really dislike fools.   
   --- /bin/vi   
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