BT.com/Deals
If you want to get Unlimited UK Calls Anytime Free for 3 months then make sure you visit BT.com/Deals as there you can get exactly that.
Currently at BT.com/Deals you can get Unlimited UK Calls Anytime free for 3 months and then just £4.99 thereafter.
You can also get BT Broadband and Calls for just £7.99 a month at BT.com/Deals or BT Vision, BT Broadband and Calls for just £15.49 a month.
There are also loads of other all-in-one BT Packages at BT.com/Deals so you can get Broadband, Calls and Digital TV with just one bill.