In each episode there are several characters with different plots and stories. Some of the performances are showing the "victims"' faces and location. This helps the viewers see the reaction of the "fonejacked". The other sort of jokes includes variety of people, who are called randomly or their face could not be shown. In this case comes the marvelous animation, that reveals in an original, caricature and some times sarcastic way the topic to the audience, if it is not clear enough or some parts are misunderstood.
The fact that only one man is plotting and performing all the roles by changing his voice is praiseworthy. However, without the funny and awesome collage-animation this show would be a radio show. A drawback might be the thing that the dialogue is in certain English accents mostly and to understand them you really need perfect English or just be a British. Therefore, it can not be translated to other languages effectively enough.
The fact that only one man is plotting and performing all the roles by changing his voice is praiseworthy. However, without the funny and awesome collage-animation this show would be a radio show. A drawback might be the thing that the dialogue is in certain English accents mostly and to understand them you really need perfect English or just be a British. Therefore, it can not be translated to other languages effectively enough.