All escorts have two phones. When you contact them by text or call, they save your number in their 'real' phone and then they 'check you out'.
Nearly everyone uses WhatsApp and I'm guessing most people have a pic of themselves. If they don't like the look of you, they don't reply.
Have you ever noticed that when you ask a girl about the guys she's seen, they always reply "I've been lucky, they've all been really lovely...no really bad ones luckily"...don't you think that's a bit odd?
I know this because I got a bit too close to one escort and she told me all the little secrets, like the invisible woman that opens the door, etc. I reckon there must be an Escorts Handbook which they all share around
They also cover for each other, so you might book Sarah for example and when you arrive you see her mate Jane. Because the pictures rarely show the faces, you have no idea you've seen a totally different girl. The Eastern Europeans do this all the time, even though they usually show their faces in the PG.
I booked one and when I turned up, she actually introduced herself as someone completely different
But she was better looking than the one I booked, so I just got on with it