“As European deals for Apple’s iPhone are announced, the chosen operators will be well advised to learn from the experiences of AT&T Wireless in the US when it comes to billing users,” says Analysys, a global adviser on telecoms, IT and media. “The kick to mobile data usage given by the iPhone in the US market resulted in some subscribers receiving bills that were very large physically — in extreme cases running to hundreds of pages — detailing every mobile data event. AT&T quickly changed the way bills were provided — issuing summaries rather than full details by default — but the issue highlights the mismatch that often exists between users’ requirements of bills and operators’ perceptions of what users want.”