If you use the BT Smart Talk application you dont just get 60 minutes of free calls to UK Mobiles from the 4/1/2014
Its 60 minutes free of any chargeable call except premium 09 or 070 numbers.
" 60 minutes of free calls per month throughout 2014 for BT SmartTalk customers. Each user (up to a maximum of 5) registered against your BT SmartTalk account
will get the first 60 minutes of chargeable calls they make using the BT SmartTalk service free. Unused monthly allowance cannot be carried over to the following month or transferred between users on a single account.
Value of free calls for each user will be shown on the account holder's bill and total value will be applied as a discount. BT reserves the right to end the offer at any time, including before the published end date.
Go to
http://www.productsandservices.bt.com/consumerProducts/displayTopic.do?topicId=3... and click on legal stuff.
I am not sure if it includes intl calls, but i understand 0844/0871 are included.