Intercepting SMS is incredibly easy. Not with this tool, but via other methods. SMS is broken and should never be used for any type of sensitive communication, be it 2fa or pics you don't want to see online.
Worse. Some very large carriers don't even look at the supporting documentation (bill, LOA) submitted with port orders unless there's a rejection from the losing carrier and they want to double check the address entered or something. Hijacking numbers is crazy simple. Same for hijacking the SMS functionality of any number in the US (voice traffic remains untouched). In about 10 minutes you can start receiving SMS directed towards any number you want, and also be able to send out texts originating from that number. Anyone who relies on SMS for any type of authentication should stop.
I used to back it up by quite a bit of data but I get downvoted to oblivion regardless of all the effort. Why bother anymore. I put it here, whoever is interested can research on their own.