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Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner

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On 2026-06-12 03:18, VanguardLH wrote:
> Theo <theom+news@chiark.greenend.org.uk> wrote:
> 
>> VanguardLH <V@nguard.lh> wrote:
>>> "Carlos E.R." <robin_listas@es.invalid> wrote:

...

> "The idea is interesting, since it does not use OTT data traffic, but
> the services of the core of the network, which makes the exchange of
> information faster and more reliable."
> 
> That is the hope.  Not a guarantee the scheme accomplishes the
> validation BEFORE the Caller ID is presented to the callee.  Faster and
> more reliable is still not a guarantee.
> 
> It isn't just the caller and callee that must both use the RCS scheme to
> validate Caller ID.  The caller must be in a searchable database by
> their provider to do the lookup by the callee's service provider. 

I don't see why?

> Both
> callee and caller must be using a phone app that incorporates the RCS
> scheme for CID validation.  

The Google default app.

> The caller, if spoofed, must have their
> phone powered on to send the RCS response.  If the spoofed caller's
> phone is off, it obviously cannot respond, but also as obvious is they
> couldn't be making the call.
> 
> The telcos for both caller and callee must support RCS.  Is RCS actually
> so prevalent that all telcos support RCS?  That is, does every VOIP,
> landline, and cellular provider for both major carriers and also all
> MVNOs (Mobile Virtual Network Operators) now support RCS?
> 

Mobile phones only, AFAIK.

...


> Any POCs (Proof Of Concept) testing on this RCS scheme yet?

This is the field testing now :-)

> 
> We can attempt reduction using client-side solutions, but are still
> allowing the spoofing services to continue operating.  Once those are
> made illegal, and globally, CID spoofing will severely wane.


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E.R." <robin_listas@es.invalid> - 2026-06-10 11:44 +0200
  Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Jörg Lorenz <hugybear@gmx.net> - 2026-06-10 17:59 +0200
  Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-10 14:29 -0500
    Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E.R." <robin_listas@es.invalid> - 2026-06-10 23:19 +0200
    Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Theo <theom+news@chiark.greenend.org.uk> - 2026-06-11 22:32 +0100
      Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-11 20:18 -0500
        Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E.R." <robin_listas@es.invalid> - 2026-06-12 12:16 +0200
          Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-12 15:13 -0500
            Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Andy Burns <usenet@andyburns.uk> - 2026-06-13 08:29 +0100
              Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-13 15:52 -0500
                Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Jörg Lorenz <hugybear@gmx.net> - 2026-06-14 07:35 +0200
      Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Jörg Lorenz <hugybear@gmx.net> - 2026-06-12 07:19 +0200
      Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E.R." <robin_listas@es.invalid> - 2026-06-12 12:19 +0200
        Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-12 15:59 -0500
      Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Theo <theom+news@chiark.greenend.org.uk> - 2026-06-12 23:11 +0100
        Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E. R." <robin_listas@es.invalid> - 2026-06-14 15:05 +0200
          Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-14 20:18 -0500
            Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E. R." <robin_listas@es.invalid> - 2026-06-15 09:24 +0200
              Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner VanguardLH <V@nguard.LH> - 2026-06-15 08:14 -0500
                Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner Theo <theom+news@chiark.greenend.org.uk> - 2026-06-15 16:29 +0100
                Re: Android will detect calls with spoofed numbers by sending a real-time RCS message to the legitimate owner "Carlos E. R." <robin_listas@es.invalid> - 2026-06-15 21:21 +0200

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