I have many spare minutes a month and was wondering what to do with them when I came across this. Basically you dial a landline number and collect points which equal minutes to national and international destinations.
See this for more detailshttp://www.qxcall.co.uk/index.php?option=com_content&task=view&id=26&Itemid=113
QX Dial+ is a system where you can collect points and spend on calling international destinations extra cheap. For example, you can call india for less than 1p/min and UAE for about 1.5p/min.
You can collect points in many different ways, mostly by calling a certain number, depending on what is available to you. Some are cheaper than another or even free. You can collect points from different methods and combine them together into single account to be used together.
The system also offers flexibility in managing your account. You can assign points you collected to be spent on any phone that you register the numbers with us. Or, you can spend it from any phones using PIN system.
After you have collected some points, you can start spending straight away. To calculate how long you can talk, simply divide the points you have collected with points required for the destinations using the table below. For example, if you have accumulate 100 points and you want to call UAE, you would be able to talk for 90/4.5 = 20 mins.