First of all, this isn't very good data to use pie charts for. There are too many categories for people to visually compare them quickly. The orange 11% looks more or less the same size as the yellow 12%, same with the blue 17% and green 20%. Secondly, the labels on the right side is faulty. You spend too much time looking back and fourth on the figure to match the color with the category.
In this case, a simple table with the data would have been much easier.
The only categories discussed in the article, are the two largest ones,"A few times a week" and "A few times a month". If those are the only two important categories, and you wanted to make a chart of it, something like this would be better:
But the main point was that people didn't use the camera function very often. Most used it only a few times per month. To state that more clearly, I would at least combine some of the categories. Maybe something like this:
Of course, the main conclusion in the article was that people used their cell phone cameras the same way they used digital cameras. Wouldn't that be infinitly better explained if they actually included data from used of regular digital cameras?
Part 2: Now with pie charts
Edit: Torbjørn said in the comments section that he didn't like pie chart. So I decided to try to present the data above with pie charts. Here is as good as it gets from me: