Yes, Apple And AT&T Really Did Sign A Five-Year Agreement In 2007

There were rumors that AT&T and Apple have a five-year exclusivity agreement for the iPhone, but Engadget dug through court documents and found confirmation that such an agreement really was signed in 2007.

Of course, things might've changed since 2007 and the agreement could've been altered plenty of times, but at least now we know that it wasn't a figment of our imaginations. [Apple Brief via Engadget via Business Insider]