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Google could be working on a shared phone number blocklist for Android
(www.androidauthority.com)
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this post was submitted on 04 Dec 2023
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Android
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I think it's too late for this to be useful. Number spoofing is ultra-common these days and most of the unwanted calls I receive are from spoofed numbers that appear to come from local areas.
If we start blocking the spoofed numbers then eventually we'll just be blocking every possible combination of digits that can exist.
What we really need first is better detection and blocking of calls using spoofed numbers.
since STIR/SHAKEN protocols started to roll-out, the number of 'spoofed' calls coming in here have fallen-off considerably. down to only one, maybe, a week on a cellular line; and one every day or two on the office pots. nearly all bogus calls coming into a cell phone are marked by verizon as 'potential spam' alongside the reported cid number--some of which don't even ring through at all.
if you get more than that on your phone, you need to get on your provider's case about their STIR/SHAKEN implementation, or lack thereof.
I'd never heard of STIR/SHAKEN....but after looking into it, supposedly T-Mobile was one of the first mobile carriers to implement it...and I'm on T-Mobile....but for the past several years, I keep getting unwanted spam calls to my cell phone that appears to be originating from very regional local numbers (area codes and number prefixes that are local to my area)...because of that I just assumed that they had to be spoofed since the calls are always an unwanted telemarketing robo call and never involve an actual business that is local to me.
So I don't know how they are still doing it, but somehow telemarketers are causing calls to route through exchanges that are completely local to me.
But try starting a google account with a spoofed number...
It might not be very useful for spoofed calls, but I can see the use to block harassers. You block once, and they are block in the phone and messages app, and also are blocked on your other or next devices.
Also, I think the block list is not shared between users, only between your own apps and devices.