Sorry to ask, but how do you intend to use the two IP Phones? Are you going to sign up for two Independent numbers - one for each phone? Or are you going to use a small PBX - one number, two extensions?
Whichever way, Vincent Thuo works for iWay Africa, doing VoIP and I can recommend him over and over. I use their services at two sites and so far I am happy.
I have copied him on this response. Sorry, I haven't spoken to him for several months - because I haven't had any problems to raise with him. I hope he's good and kicking somewhere and will be able to offer you his superb services.