We don't directly handle telephone verifications.
This is because typically telephone verification requires the co-ordination of calls and passing of codes directly with business owners/clients. Meaning it really needs direct client contact to make it work smoothly.
Also a lot of our SEO customers prefer for us to operate as an invisible partner in the background.
So we found that the best way for us to handle directory websites that require phone verification, is to complete the account creation & data submission steps, then pass on the details for you/client to complete the phone verification step.