Hi,
I’d like to be warned on incoming phone call that the emitter is a suspicious caller.
In France we have range of phone numbers that we can easily black-list. (Some bastards keep using regular phone numbers)
I tried “Spam Blocker” App with regex but it doesn’t seems to work at all. May I have missed something. Ultimately I’d like my kid could be reached only by while-listed number.
So how do you avoid vocal spam ?
Which app or /e/ OS settings do you use ?
Maybe Telephone>Settings>Blocked Numbers…
My guess is that this blocks any number not in the Contacts database.
Thank you very much.
You answered to my 2nd question « how to strictly deny access ». I’ll be ok for my kid.
In my case, I must still be reachable by new numbers. First question is still open !
No, this is for anonymous calls that do not reveal the caller-number…
Spammers spoof legitimate numbers so there is no way to guarantee blocking them. The best thing I have been able to come up with was porting my number to a SIP provider, routing calls to a PBX and pushing all unknown numbers to voicemail. Genuine callers leave messages.
Thanks. It wasn’t clear.
In France, legitimate advertisers must use phone numbers in some known ranges (eg: 0568, 0569 → +33558* and there are 17 ranges).
So if we could stop them it will be a good start.
Anonymous calls can be blocked by my ISP. I don’t know if other ISP offer this service. Thanks @obacht for our accuracy
Finaly, for bastards who impersonate regular numbers … we can only report their calls to a national anti-fraud service… and add them into my local black-list 
The SIP & PBX method would let you identify the legitimate advertisers and terminate the call immediately or play them a recorded message first. I use FreePBX. There’s a learning curve but it’s worth it.
An incoming call filter that could just ignore all calls from numbers not in the address book would be great; the alternative to filter by regexp would be gravy.
Having a regexp filter that then passed through the address book filter would be heaven.
If it could also apply to txt messages? I would probably die from bliss-overload.
I personnaly use Yet Another Call Blocker for this purpose, blocking all the ranges of commercial phone numbers in France based on Regex, it works like a charm 
It also embed a community-based blacklist that growes based on up/down votes from users, I highly recommand it !
Arrrggg…
I’ve discarded this one because it wasn’t updated for 3 years. I thought it was dead.
I may give it a shot…
Well, now you mention it, I installed the app more or less 3 years ago so it didn’t trigger me at that time, but I don’t recall having updates since…
Still, it works as expected so as long as there is no major issue or security breach, I’ll stick with it !
