Nokia still plans to launch the X7 in other markets, this person said.

WSJ: Nokia Cancels U.S. Launch of X7 Phone

The X7 would have been the first Nokia smartphone launched exclusively with a U.S. carrier since former Microsoft Corp.

WSJ: Nokia Cancels U.S. Launch of X7 Phone

Nokia's Symbian operating system, which powers the X7, is seen as cumbersome and outdated.

WSJ: Nokia Cancels U.S. Launch of X7 Phone

Nokia recently canceled the U.S. launch of its X7 smartphone, which runs Symbian.

WSJ: Nokia Considers Adopting Microsoft Phone Platforms