Does anyone else get those calls that hang up no matter what after 5 seconds?

Simple trick: Never say anything before anyone at the other end say something. Even if it might seem awkward at first, spammers will not get your voice samples this way.

@filthyranter that makes sense

@Gerrymandered You can still save client's numbers so you know "ah, that person will not grab my 'Hello' sample". Scammers actually use that.

Additionally, try to avoid saying "Yes" with numbers you don't know what they are all about, no matter what question it is.

telbots are bruteforcing every possible phone number for collecting sellable "real customer" numbers.

.
.
.
.
.
Click