Nokia Lumia 900 received good but not great reviews in preparation for its April 8 launch on AT&T, with most writers saying the 4G Windows smartphone is an excellent value at $99 but not an iPhone killer. Industry observers say Nokia is relying on the Lumia to build a business in the U.S. Also, a Nokia executive on Tuesday unveiled the cellphone maker's PureView phone with an enhanced camera function, but declined to issue a release date. That phone does not run on Windows software.

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