I thought I was all set to use the Obi100 but I've wanted to keep my landline number. I looked into Callcentric that seemed to be a fine solution, the site said it could port my landline and give me e911, way cool! However, a few days later, the site said my landline could not be ported. I've written Callcentric three times (get auto email reply saying they will get back with me and never have...thought they were a good company, but not good communication yet). Can anyone tell me if there is a similar SIP service that can I may be able to port my landline to and use with the OBI. Unfortunately, Google Voice doesn't serve my exchange area, so I will use GV as one line for calls out and another SIP/VOIP as the other for calls in by folks who are familiar with my regular landline number. Help appreciated, Rick