Can someone explain what are the (technical) challenges to solving this? I feel like it shouldn't be too hard, and should go hand in hand with modernizing the phone system.
F*ck your PBX. Phone companies a) won't insure that companies only send Caller ID data that actually belongs to them, and b) won't cut off providers that don't do likewise.
Caller ID that isn't trivially spoofed wouldn't hurt, either.
Curiously, I had two "microsoft tech support" robo-voice robocalls just tonight. The bastards.
https://www.youtube.com/watch?v=D_YjvC4ndzM
Lyrics I done suffer no be small / Upon say I get sense / Poverty no good at all, no / Na im make I join this business / 419 no be thief, it's just a game / Everybody dey play em / if anybody fall mugu, / ha! my brother I go chop em / National Airport na me get em / National Stadium na me build em / President na my sister brother / You be the mugu, I be the master / Oyinbo man I go chop your dollar, / I go take your money and disappear / 419 is just a game, you are the loser I am the winner / The refinery na me get em, / The contract, na you I go give em / But you go pay me small money make I bring em / you be the mugu, I be the master… / na me be the master ooo!!!! / When Oyinbo play wayo, / dey go say na new style / When country man do him own, / them go dey shout: bring em, kill em, die! / That Oyinbo people greedy, I say them greedy / I don't see them tire / That's why when they fall into my trap o! / I dey show them fire"
Translated by Azuka Nzegwu and Adeolu Ademoyo.
I am suffering greatly / and I get this idea (or wise) / poverty is not good at all / and I decide to join this business (scam) /
419 is not a criminal act but a game / Everybody will play / but if you are fool / I will chop your money /
Chorus:
I own the National Airport / I built the National Stadium / The president is my sister's brother / You are the fool and I am the master /
White man, I will eat your dollar / I will take your money and disappear / 419 is just a game, you are the loser and I am the winner /
I own the refinery / I will give you the contract / But you will have to pay me a small fee before I bring them / You are the fool, I am the master / I am the master!!!! /
When whites scam / it is said that it is a new style / But when the country man does the same / White people shout: bring them, kill them, die! /
White people are greedy, I say they are greedy / I have seen through them deeply (or very well) / So, when they fall into my trap / I will show them fire (or showing someone who is the real boss by treating them harshly)