Great! Does everything I needed it for. I am very happy. I am using Linphone in combination with one of my VoIP-accounts and its flatrate on my phone together with an Internet flat  but no phone flat. It has - what I expected and what's usual - about 1/2 sec delay but I can live with that. I can call others without major problems (see delay) and inbound calls reach me  too.
January 09 2016