When do you say the shema for sleeping nowadays?

In the modern day, many people fall asleep using their phones. I know it’s not healthy but we do (me being one)

I like to put on a video or podcast and fall asleep listening to it.

We are supposed to say the shema before we go to sleep, but what do we do in the modern day?

My question is, do you say the Shema when you get in bed, or when your starting to fall asleep?