“It looks like the iPhone 4 might be [Apple’s] Vista, and I’m okay with that,” Kevin Turner, Microsoft’s chief operating officer told an audience in Washington, D.C. yesterday. Apple stock started falling after buyers of the much-anticipated new smartphone discovered that touching the external antenna causes dropped calls. The highly influential Consumer Reports magazine decided it would not recommend the iPhone 4 on Monday. Apple stock has declined 8 per cent since the June 24 launch. Microsoft faced similar financial damage after its much-anticipated Vista operating system received bad reviews when launched in January 2007. Microsoft stock fell about 10 per cent in one month.