CU Phone Verification System

Anybody else have difficulty with CU phone verification for affiliate sign up?

Page says

"Please note this system is programmed to REJECT VOIP Lines, Pre-paid cell phones, payphones, and all other anonymous telephone sources."

I have tried using my cell phone number(not prepay) and VOIP line (who doesn't use VOIP only nowdays?)

I got nothing else. WTF?

I first tried to sign up on my home phone which didn't work. I then tried on my pre-paid mobile phone and that worked. . That was on a UK number though.

Is the owner a member here?