Or at least on my provider’s service (Voicepulse). When the other party hangs up the like, it immediately goes to a dial tone. If we assume that everyone in the movies from now on has a VOIP phone, there’ll be one less piece of fodder for the nit-pickers.
Is your VOIP phone a cell phone? Because that’s what I always notice. I mean…how can I tell someone in a movie has a VOIP phone?
Also, I suspect the reason is that otherwise 90% of their customers would call them all the time saying their phones don’t work because there is no dial tone.