Review: Nokia Lumia 635 for T-Mobile
The Lumia 635 is a good little phone. The hardware is decent, if somewhat boring. It feels solid and the exchangeable covers are a nice option to have. The screen isn't the best ever, but battery life is quite good. The phone does a great job connecting to T-Mobile's LTE 4G network, and voice quality is really good.
Windows Phone 8.1 functioned perfectly on the 635, despite the limited RAM and middling processor. All of the main OS features, including the Cortana virtual assistant, performed exceptionally well. New features — such as Action Center, notifications, the trace keyboard, and others — make the 635 a solid contender with today's inexpensive Android phones. Perhaps the biggest failing is the camera, which only rates "adequate" in my book.
T-Mobile is offering the Lumia 635 at a rock-bottom price point. If pricing is a major concern, the Lumia 635 is the budget phone for which you are looking.