Even in movies before mobile phones, more often. Than not, they could resolve any problem by just telling the other people something, but they don't because the movie would be over.
Also, ever since covid, a lot of movies became way more believable. Man if only the people knew that a pandemic was coming. If only we knew how dangerous it was, if people in other countries could've been warned from other countries where it's already ravaging
Didn't stop any of the wacky bs in iRobot from happening. Cellphones do cure a lot of what ails older pics, but they can be waved away by things like 'oopsies! Forgot to charge it.' or 'the club is so loud I didn't hear the ringer.' and my personal favorite 'forgot to take it of dnd'.