玛格丽特里尔顿，在小组讨论中报告CNet诺基亚首席执行官Olli-Pekka Kallasvuo和巴塞罗那AT＆T首席执行官Ralph de la Vega之间的Steve Ballmer：
iPhone maker Apple isn’t at GSMA Mobile World Congress 2009 along with the rest of the mobile phone industry, but the company’s growing success is definitely top of mind for key executives in the mobile market[...]
“顾客希望我们简化，”德拉维加说“Our corporate customers, especially, want a smaller set of operating systems to manage.”
“The iPhone is a great success, but it would be even better if the applications were interoperable.”
康培凯同意了And he used Apple and its “closed” ecosystem as an example of what could limit innovation in the mobile market in the futureHe said Apple’s vertically integrated model, where its hardware and software are tightly controlled by the company, further fragmented the marketAnd he added that what is truly needed is more openness in developing applications.
Ballmer argued that device openness was important to give customers more choicesAnd he pointed to the number of choices that Windows Mobile customers have when choosing a device.