This holiday season, you can talk to your far-away relatives and friends to your heart’s content without having to worry about the phone bills. The @Skype team has just tweeted an offer that is too good to ignore.

Skype to Skype calls have always been free but you can now also use Skype to make free and unlimited voice calls to mobile phones and landlines for 30 days. In addition to phone calls, you can also have video calls with a group of 3-10 friends during the same offer period.

To get started, use this special link to sign-in to your Skype account, enter your credit card or PayPal details (you won’t be charged) and complete the sign-up process. Once your Skype Premium service is activated, you can cancel your recurring subscription immediately while the premium services will continue to work for the entire 30-day period.

The fine print says that you can make free calls to landlines and mobile phones in Canada, Guam, Hong Kong S.A.R., Puerto Rico, Singapore, Thailand and United States.

The countries where you can call landline numbers for free include Argentina, Australia, Austria, Belgium, Chile, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Israel, Italy, Japan, South Korea, Luxembourg, Malaysia, Netherlands, New Zealand, Norway, Poland, Portugal, Russia, Slovakia, Spain, Sweden, Switzerland, Taiwan, United Kingdom and Venezuela.