Multiple phones.
Back seam stockings.
These are the signs I look for when spotting other providers in public. What do you think tells on an escort, ladies and gents?
Do you care if you/your company are overt about their intentions when meeting for an outcall or do you prefer discretion?
Personally, I'm a girl who gets off on anonymity so, I relish knowing only myself and my company know why I'm there.