Key PointsNvidia signed a $1 billion partnership with Nokia late last year.The deal has improved the fortunes of the beaten-down telecommunications stock.Is Nokia stock now a buy?10 stocks we like better than Nokia › Nvidia is the most valuable company in the world, with a market cap of more than $4.7 trillion. It has become not just an earnings powerhouse for its investors, but also for its partners. Last fall, Nokia (NYSE: NOK) inked a $1 bill…