Apple may be poised to become the world's first trillion dollar company thanks to the iPhone, but sustainability of the pricey handset is now being put into question. One prominent analysts warns that United States carriers such as AT&T - faced with plummeting margins at a six-year low - are now considering reducing iPhone subsidies and adopting stricter upgrade policies.
If instituted, these changes could result in a more expensive iPhone and an estimated worldwide drop in sales of 27.5 million units in the June quarter, with a revenue estimate $1 billion below consensus...