Give 3 months free international calls on Skype when buying Lumia phones

Nokia Vietnam says from now until 12/31/2014, when you buy a new phone Lumia genuine run on WP 8.1 will receive a gift certificate Gift Skype, the inside contains the code used to activate including gift wrapping Skype international calls free for 3 months. Once enabled, you can call Skype on any machine that is also not necessary to use a Lumia.
Guide activated
Gift vessel Skype app from the app store on the WP.
Open it up, log in using your Skype account or registered.
Enter voucher code written in gift certificates can be purchased at the machine.
Call your country is?
You can call to mobile and landline phone for free in the following countries: USA, Canada, China, Guam, Hong Kong, Puerto Rico, Singapore, Thailand.
Free telephone call to: Australia, Austria, Belgium, Spain, Sweden, Switzerland, Taiwan, Turkey, United Kingdom, New Zealand, Norway, Italy, Japan, Korea, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Guadeloupe, Hungary, Iceland, Indonesia (Jakarta), Ireland, Republic of Ireland, Israel, Latvia, Lithuania, Luxembourg, Malaysia, Malta, Mexico, Morocco , Netherlands, Panama, Paraguay, Peru, Poland, Portugal, Romania, Russia, Slovakia, Slovenia, South Africa, Venezuela, Andorra, Argentina, Brazil, Brunei, Bulgaria, Chile, Colombia, Costa Rica.