Third-Screen Branding Poses Its Own Unique Set of Challenges. For all intents and purposes, the launch of Apple’s revolutionary iPhone – complete with folks lining up and even sleeping on sidewalks in anticipation – heralded a new age of portability. The iPhone and all other soon-to-be-launched mobile phone-centric devices are not simply about the portable phoning capability (so yesterday). They’re about the portable internet; portable entertainment; portable news; weather and sports; portable retailing; and, yes, the opportunity for portable branding. Read more here.