Nowadays, cellphones are all about apps. And Microsoft is so determined to have lots of brand-name apps for its Windows Phone app store that it is willing to pay for them. All an app maker has to do is sign on the dotted line.
After years of struggling in the phone market, Microsoft teamed up withNokia last year to challenge the dominance of Apple’s iPhone and Google, which makes the Androidoperating system. The latest fruit of their collaboration is a gleaming machine called the Lumia 900, which goes on sale in the United States on Sunday and is considered to be the first true test of how well the partnership will fare.