T-Mobile definitely does it on the network level and my iPhone shows Scam Likely sometimes.
On Thu, Aug 30, 2018 at 4:04 PM Alex Balashov <[email protected]> wrote: > Thanks, David. > > Setting aside the question of "how" - I agree with your speculations on > the "sauce", "where" is it done? Do the US mobile majors do this at the > network level? Do some of them use Google's service for it, which as I > understand is baked into the Android Phone app but may not be enabled? > What about on iDevices? > > I'm not really concerned with people who use apps to screen > telemarketers. They're just not a big factor for me; most people do not > use these apps. I'm interested in what happens by default without the > user's intervention. > > On Thu, Aug 30, 2018 at 11:00:49PM +0000, Hiers, David wrote: > > > Hi Alex, > > I have no idea how it is actually done, but there are lots of useful > metrics just lying around that one could use. Things like: > > > > The last time a specific terminating number called a specific > originating number > > Number of calls > > Rate of calls > > Ratio of originated/terminated calls > > Time of day > > ASR > > Call duration > > > > Like any kind of dynamic reputation metric (credit score, IP Address > reputation, credit card fraud detection, etc), I bet the actual > secret-sauce is pretty closely held. Gotta be some patents in this area, > though. > > > > I'll also bet double that you could come up with a wicked method for > weeding out the "probably unwanted" calls! > > > > > > > > David > > > > > > > > -----Original Message----- > > From: VoiceOps [mailto:[email protected]] On Behalf Of Alex > Balashov > > Sent: Thursday, August 30, 2018 3:27 PM > > To: [email protected] > > Subject: [VoiceOps] ANIs flagged as telemarketer/spammer/scammer > > > > Hi, > > > > So, of course, it is a known problem in the legitimate side of the lead > engagement call centre, survey, etc. business that ANIs get flagged as > "telemarketer" pretty quickly and start showing up that way on people's > phones. > > > > Your normative viewpoint on that may vary depending on what you think of > lead gen calls, but regardless, a reasonable person would differentiate > > between: > > > > (1) Legitimate outbound dialing operations that are following up with > leads who provided their phone number and agreed to be called (at least, as > a matter of clicking "accept" on _something_), or for some other legitimate > mass-dialing purpose, and who actually own the DID inventory from which > they present local-market ANIs and can in fact be reached on those numbers; > > > > (2) Illegal spammers who use fake ANIs and call people who did not in > any way consent to being called by them. > > > > I am trying to learn a bit more about how this is done and what a > legitimate, above-board business can do about it. > > > > Ignoring the factor of third-party call-screening apps (which most > people with a mobile don't use), where is this generally implemented? As I > understand it, T-Mobile do it on the network level. I have T-Mobile myself, > and probably 2/3rds of unfamiliar numbers, including quite legitimate ones, > show up as "Scam Likely" — I know that's come up on the list before. AT&T > displays "Telemarketer"; do they do it that way too, or do they use a > Google Android feature for that which they enable as part of their carrier > defaults for carrier-issued phones? What about other carriers and Android? > > > > As far as I know, Apple don't do anything like this. Do people with > iPhones just not receive this "service"? How does that work? > > > > Asking where the central, or the most influential authority lies and who > provides it goes to the heart of the real question, which is: what can a > legitimate business do if their number has been blacklisted this way? As I > understand it, the maintainers of these lists, along with the criteria for > getting on them, are elusive and inscrutable, and there's really no > recourse and no appeals process. I furthermore understand that this has led > to the widespread approach of rotating ANIs, but that's a losing battle; > they get flagged too. I imagine it won't be long before the criteria for > "Scam Likely" are just "number appears to call lots of numbers in this rate > centre and otherwise hasn't been around very long". > > > > But this is all just conjecture on my part; I really don't know much > about how my carrier, anyone's carrier, or some BigCo that's behind my > mobile OS decides that a call is a "telemarketer" or "scam" call. If anyone > can shed some light on how this really works and what, if anything can be > done about it, I would be most appreciative. > > > > -- > > Alex Balashov | Principal | Evariste Systems LLC > > > > Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) > > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > _______________________________________________ > > VoiceOps mailing list > > [email protected] > > https://puck.nether.net/mailman/listinfo/voiceops > > > > ---------------------------------------------------------------------- > > This message and any attachments are intended only for the use of the > addressee and may contain information that is privileged and confidential. > If the reader of the message is not the intended recipient or an authorized > representative of the intended recipient, you are hereby notified that any > dissemination of this communication is strictly prohibited. If you have > received this communication in error, notify the sender immediately by > return email and delete the message and any attachments from your system. > > -- > Alex Balashov | Principal | Evariste Systems LLC > > Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops >
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