How to get free Skype
1) Buy a new Lumia 735, 530, 630, 635, 930, 1320, 2520, 1520, 1020, 625 & 925.
2) Make sure your device has Windows Phone 8.1 software.
3) Go to the Windows Phone Store & download the Skype Gift app.
4) Follow the simple instructions.
T&C:
To take part in the offer you must be at least 18 years old and a resident in Australia or New Zealand.
and
Unlimited World subscription includes calls to both landlines and mobiles in Canada, China, Guam, Hong Kong SAR, Puerto Rico, Singapore, Thailand and United States and calls to only landlines in Andorra, Argentina, Australia, Austria, Belgium, Brazil, Brunei, Bulgaria, Chile, Colombia (excluding rural areas - LEX), Costa Rica, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Guadeloupe, Hungary, Iceland, Indonesia (Jakarta only), Republic of Ireland, Israel, Italy, Japan, Korea, Latvia, Lithuania, Luxembourg, Malaysia, Malta, Mexico, Morocco, Netherlands, New Zealand, Norway, Panama, Paraguay, Peru, Poland, Portugal, Romania, Russia, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Taiwan, Turkey, United Kingdom, and Venezuela. Excludes special, premium and non-geographic numbers.
Hat tip to abc on ozb