Thing is that with all virtual phone numbers i tried i get this error:
"We regret to inform you that we are unable to process your verification request with the phone number provided. Please note that only fixed line and contracted mobile phone numbers are supported by our SMS and Automated Call verification systems. "
Why won't that happen when I order one of yours?
Have you used a google voice number before? They are different from general VOIP numbers; they work in verifying when other VOIP's fail.
Of course, I can't assure you that it will work in your case as I don't know what site you are trying to verify, but google voice generally works most, if not all, of the time.