Question Author
Thanks, I've emailed my network so maybe they'll get back to me eventually. RJA I get what you're saying about a caller's right to withhold their number. But it's so annoying! They just rang, I answered, and they listened for a minute and then hung up. Whoever it was rang to find out who was answering my number... and I don't like that! Anyway it's no big deal but if it happens more than once I'd consider it a nuisance. Thanks for the answers guys!