I have been using Viatalk as my US provider for a few years now, and until recently I had been very satisfied with them. However, for the last few months their service has left much to be desired - constant authentication failures, registration failures and servers unavailable. So I am looking to switch, and I am asking you for recommendations. I need: un-metered calls in the US, local numbers, multiple “lines”, and of course, Asterisk compatibility. I would also want to keep my existing Viatalk numbers, so the new provider should be able to handle number transfer. Any suggestions?