The 5.7-inch Lumia 950 XL is, without question, the most powerful Windows smartphone ever released. But there's an uneasy question casting its shadow over the phablet, despite the aura of excellence emitted by a promising spec sheet, ambitious camera setup, and the novelty of running Windows 10. Can this device gain back the mind and market share lost by Microsoft Mobile during its year of restrained, sporadic activity? Find out in our review!