We often prattle blithely about how exciting this and that might be if only we could gather the data by getting people to do this or that with their mobile phones. Of course, neither of us has any idea what that might entail in real life. Nor do we intend to find out. You, however, may be different, and crying out for the right tools to do the job. Here, then, thanks to a work colleague, are two important documents. An introduction to collecting data from mobile phones, and the associated matrix comparing different tools.
So off you go. And let us know how you get on.