No. My mistake I worded my post wrong. It took 45 mins to depart from Denver and that's when she wouldn't turn her phone off to take off
Oh...ok, that makes sense. When I was working I did a lot of traveling and one time in Columbus, OH, we were getting ready to take off, and a lady did something with her phone like you described, but I was not really aware of what was happening until about after 5 or 6 minutes the plane stopped it's taxi before, came back to the terminal and some Security came aboard and took her off. That is how we all found out what she did.
But, lately, I've been hearing about the laws being changed to allow passengers to keep electronics on regardless and there really is no need to turn anything off.