When I try to use VOIP phone numbers for SMS verification (tried voice calls too -- neither work at the moment) ... I get this error: "This phone number cannot be used for verification." What service do you guys recommend for this type of verification? Feel free to PM me if you prefer. I'd be willing to donate 5 or 10 bucks via paypal for a suggestion of a service provider that works... this has really become problematic for our operations. Thanks in advance!