Disclaimer - I work for a company that sells VoIP Services
Hi Nexus77 - I saw a link to this post on a twitter account - and thought I would throw in my 2 cents.
As far as whether a VoIP Provider can accept a transfer of your phone number should strictly come down to your current service provider, and whether or not they will allow THEIR number to be transferred to a different provider (some existing providers are very stingy on this, and will not let their numbers go) - the best thing you can do is to contact your existing carrier, and find out if you're allowed to transfer our your specific number - if they say no, there isn't anything any provider will be able to do (as far as I know).
Now - with that said - I talked to our people here, and we can take any number in the US/Canada, as long as the existing provider allows it to transfer - the transfer process requires a form and, yes, your latest phone bill.
Just here to help!
Last edited by 57; 2014-07-16 at 02:24 PM.