1) Have you seriously never heard of locations having multiple internet services they can rotate between? Because it's trivial to rotate between 30 or 40 WiFi networks even before you get into mobile SIM swapping software.
2) In addition to being a privacy nightmare, SMS authentication costs a significant amount of money for a service to provide, is plagued by an extremely high rate of toll fraud and pumping (especially in the countries that we're having the highest spam problems from), and has a very low rate of success at stopping any kind of spam because any spam network of any appreciable size has racks of hundreds of thousands of SIM cards wired into devices and software that automatically tracks which numbers have been provided to which sites, selects the next number that's up, and handles the SMS verification. You can buy a full turnkey spam system for about $1000 USD. The only reason anywhere uses SMS verification anymore is inertia: it is useless.
3) If you read the comments on the previous post, you will see I have already answered this question.
Please assume that we are competent professionals who know a great deal more than you do about the problem and are addressing the issue in the least restrictive fashion possible to us that is likely to be effective.
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2) In addition to being a privacy nightmare, SMS authentication costs a significant amount of money for a service to provide, is plagued by an extremely high rate of toll fraud and pumping (especially in the countries that we're having the highest spam problems from), and has a very low rate of success at stopping any kind of spam because any spam network of any appreciable size has racks of hundreds of thousands of SIM cards wired into devices and software that automatically tracks which numbers have been provided to which sites, selects the next number that's up, and handles the SMS verification. You can buy a full turnkey spam system for about $1000 USD. The only reason anywhere uses SMS verification anymore is inertia: it is useless.
3) If you read the comments on the previous post, you will see I have already answered this question.
Please assume that we are competent professionals who know a great deal more than you do about the problem and are addressing the issue in the least restrictive fashion possible to us that is likely to be effective.