I doubt the girl existed in general.First off, I doubt the incident ever happened. So, I have no idea why she was doing that nor do I care.
You doubt a girl was talking on the phone while doing something else?
Just how old are you?
Seriously
My daughter can text on one phone and talk into the other while watching TV.
But you do have a point.
I text and talk on my phone at the same time, quite often.
I text and talk on the phone while drinking a 40 and eating Churchs while I drive.