<tt> > That opens up ENUM for at least 0,5% of all mobile phone users > worldwide. Or am I too optimistic. </tt> <tt>It's a start, and a proof of concept.</tt> <tt> > No, sorry, don't get me wrong. This *does* make sense, but I hope you > agree it's not the answer to the problem. The makers of the more > widespread handsets will not implement something like that guess for > that reason, knowing that the majority of handsets are distributed > through the network operators' channels. > > Two technical questions: > > 1.) Making the lookup does require your handset to have a GPRS / 3G > Internet connection, right?></tt> <tt>Yes, the application works over WiFi, or 3G/Edge if enabled. It won't enable itself if all it has is GPRS.</tt> <tt> > 2.) If the result of the lookup is sip:someone@mysipprovider.com, how do > you deliver the call. Again over IP? You know that you will have a worse > sound quality than GSM that way and that you will violate the contract > conditions of I guess 75% of all mobile operators that way? </tt> <tt>If the chosen record is a SIP URI, these can be called using the Sipdroid application for Android, to which I have contributed patches.</tt> <tt>The version of that software that's in the Android Market is WiFi only, although there's a developer version which does SIP over 3G/Edge (but again, only if enabled).</tt> <tt> > I mean, you may not care. But the discussion here is about widespread > adoption. I can see the case where if an app like yours spreads (it > could possibly we written for iPhones, S60 handsets, etc.) an operator > may just decide to block all SIP traffic on his networks. That wouldn't > necessarily make a good case for ENUM, would it? </tt> <tt>This app would be a lot harder on iPhone or Symbian because it's far harder (if not impossible) to hook and intercept outbound calls.</tt> <tt>I'm not going to get into the market penetration discussion - I'm (mostly) just a tech.</tt> <tt>cheers,</tt> <tt>Ray</tt> <tt>-- Ray Bellis, MA(Oxon) MIET Senior Researcher in Advanced Projects, Nominet e: ray@nominet.org.uk, t: +44 1865 332211 </tt>