I think this Nokia Lumia 635 is the best smartphone for its price range if compared to the many cheap Androids in the market. It also has one of the best battery life for any class range and its size. About nearly TWICE of the Sharp Aquos Crystal. I remember getting only 5 hr SOT on my Samsung Focus three years ago. We've come a long way from a single core 1 GHz Snapdragon to a quad core 1.4 GHz Snapdragon 400 with better stamina and cheaper price.
I took pix comparing Lumia 635 vs Sharp Aquos and I must say the Sharp actually takes better photos indoors. In my other post, I am not raving about Aquos' cam. I much prefer using the Sharp anyway because of Android and because the Nokia tends to be very nonresponsive with the touch screen while typing. I think the Focus was smoother than this. Plus, I played a quick game of Sonic Dash. Android has the latest version. Even if both Aquos vs Lumia have SD400 SoC the Nokia lagged a bit more with graphic stuttering here and there.
I think if you want a cheap media player with good loud sound and long battery life, get Nokia Lumia 635 if you can learn to love Windows Phone in the longer run and can accept the lack of useful apps. For me, Android ftw! I prefer paying twice more for a Aquos even if battery life is only about 60% as good as the 635 and external sound is softer. Android over WP, better design, Harmon Kardon audio, less crashes, 1 GB more RAM, better cam with FLASH, has a front cam, swipe to wake, swipe status bar for screenshot, and bigger and sharper screen at nearly the same dimensions.