I was somewhat surprised to get a PM asking for a phone number.
Common sense says that if a gal restricts her number to post screening then calling out of the blue unscreened is a poor way to begin an intimate relationship (not to mention a great way to end it before it starts)
Very few of the gals have any sort of draconian screening and in the end it's for everyone's safety. Beyond that it's a very personal business. I've reached out to a few gals who've never responded back. No problem, I respect the fact that the gals have every right to limit those they see to try and ensure mutual fun vs. a trip to the dentist (so to speak). If you've reached out to someone and gotten no response then either she's busy, hasn't gotten around to screening you...or possibly just doesn't have an interest. Send a follow up PM or two and then just keep walking....keep eccie a stalker free zone....better for us all.