The free-call bonanza now includes France, Israel, Italy, Thailand and the UK, among others.
The fixed wireless voice terminal lets users take inbound cellular calls from traditional home phones.
Application users on Android can place domestic and international calls to outside lines for a monthly or per-call charge.
Buy any Internet-connected gadget from Tesco, including the supermarket's £119 Hudl tablet, and you get a year's broadband for nothing.
Ringing your neighbour from your landline could require more button presses, as Ofcom gets people in five cities to dial the area code.
The Nanu app plays sponsored ads before a call, letting users make free calls to other app users, as well as landlines and mobiles not using the app.
BT's new SmartTalk app makes calls at your landline rate from your mobile when you're out and about, or even out of the country.
This year, the carrier will outfit a number of dugouts with wireless voice systems. And for the fans in the stands, there'll be expanded wireless 4G coverage.
Bridget Carey shows that even landline phones can be different and they show up at CES 2013.
Already available directly to its customers, Sprint Phone Connect will now be offered through the carrier's wholesale wireless providers. Plug a home phone into the device, and calls are carried over Sprint's network instead of the landline.