Nokia N95 - Just because I'm cheap!
Some time ago, with a little help of TDI some time ago I’ve successfully switched all my outgoing calls to Voipdiscount, while at the same time moving my incoming calls’ number to mobile provider through a Sagem base station, all of this nicely integrated in a Linksys SPA3102 gateway in a way that a regular person grabbing a phone at my desk cannot realize that at the current moment it’s a hybrid not really having much in common with the POTS, they expect to be using. All of this effectively reducing the monthly phone spending to a negligible monthly fee, just in time when my eldest starts to spend hours on the phone - great!