With your PC becoming more and more like your mobile phone every day, there are now plenty of services that offer unlimited voice calls through your PC for a flat rate. (pocket-lint.com)
It includes unlimited voice calls and internet usage and comes with a one - month validity. (phoneradar.com)
There is a particularly high volume of unlimited voice call, text and data allowance deals, so heavy duty users should cash in now while the going is good! (techwelike.com)