Three makes 0800 calls free, test it with the Singing Dictionary
three singing dictionary

UK network Three have made 0800 calls completely free on its Pay Monthly price plans so you can save even more cash when out and about. Can't think of a number you can test this on? Well Three have one for you; the awesome Singing Dictionary. You can have a little taste of the line by watching the amusing advert from Three above which has the Singing Dictionary surprising members of the public. You can try it yourself by calling 0800 808 5883 from your Three smartphone. Satellite

Calls to 084 and 087 numbers will be just 5p a minute. Plus Three is also making 4G available to everyone at no extra cost. All you'll need is a 4G device and be in a 4G coverage area.