Ask the gal on the other end of the phone if the pictures are her. If she says "yes", say "fantastic"!

Then ask if this is her cell phone. If she says "yes" again, say "fantastic"!

Go ahead and set the time (and date if the appointment is later in the week) and discuss the fee schedule if you don't already know from looking at her ad/website.

Now, here's the part where you have your answer about the accuracy of the pictures... Politely thank her for the appointment and acknowledge that your looking forward to enjoying some time with her soon, then say "before we end this lovely conversation, you stated your pictures are accurate and this is your cell phone... is that correct?" When she says "yes" once again, reply with "fantastic"... then ask her to turn her cell phone around and snap a picture of herself holding up her fingers in a "piece" sign and text it to you!

If she says/does anything other than turning her cell phone around and snapping a picture of herself and texting it to you while holding up her fingers in a piece sign... the ad is Bait & Switch, and she is a LIAR.

Go back to surfing and next time call a TER reviewed lady with a website link and multiple reviews.

First of all, if it is not her, you should leave immediately.

Second, if you stick it to her, and then try to stick it to her, good luck.

Third, if it is not her, these ladies are not the most, shall we say, honorable. Likely a "boy friend" is nearby who is more that trigger happy to make your life miserable. If you leave immediately (sorry, wrong room), you are most likely to make it out without incident.

and the lady in the hallway is not who you are looking for, don't open the door.    

If you go to a lady's incall and when the door opens, it is not the lady you expect, go get what you "forgot" in your car and leave for good.

If you only see well-reviewed ladies, your chances of having to do one of the above are not very likely.

Scoed nailed it.... a lot of pre-paid phones do NOT have cameras. I have had guys request that tons of times.. no camera phone, so no pic... BUT, my pics have always been real and recent. If you've done your research beforehand, you should know whether or not she has reviews or not.
Ladies who use that line and it's NOT them, usually bank on the idea that most guys will theorize that, 'Hey, I'm already here, it's not the girl in the pics, but she's cute enough.... sure, I'll stay'.... and they continue to run their scam. The best thing to do is WALK AWAY... because of  course she's not going to see you for free. Some girls here in Madison were using that line, and it wasn't them in the pics.. the way they got around it? The "madam" was answering the door, collecting the "initial donation" through the door, then you went back to see the lady.. the guy would say, 'Hey, you're not the girl in the pic.. I get to see you for free!'... and she would respond, 'Yes, we can sit here for the hour and talk for free.... anything else is extra anyway'......