SS-SYSTEM @ 18.06.19, 15:14
2 beeps from the caller, and with checks all 4
Um ... If I do not want to receive from someone calls, I was the least interested in what he was going to listen and how much :)
With regards to the large number of checks on modern processors, even if not the last, hardly a difference should be visible "to the naked eye." Of course, in the case of requests to the remote base to other factors.
Actually, what about asking users not to increase automation, and in leaving the final decision to the user. And it turns out that someone Tinkoff zadolbal calls (although they are more than a few times with advertising not called) and in base a negative rating, but someone Tinkoff client and he calls out needs.
White list? It is not always possible to know in advance the number.
In general, all the cockroaches :)