Okay folks, now you got me wondering so I decided to try this out to verify. First I called our landline (yeah, we've still got one) [emoji16]. I answered the landline and waited a few seconds and hung it up. My iPhone stayed connected for a solid 10 seconds but then hung up. Then I repeated the trial by calling my wife's iPhone and did the same thing. This time my phone disconnected the moment that she hung hers up. So, I stand corrected so far as the cell phone to cell phone goes. But there's quite a delay when calling a landline. I do know for sure that it did used to be calling party disconnect, but maybe my age is showing. Sorry if I gave false info.