I am using this phone since 5 years. and its performance is unbelievable. nokia and lumia this combination works great. 1 gb of ram and 8 gb of inbuilt memory never feels you slower. this phone has been fallen down around 15-20 times but that gorrila glass and compact design of this phone not put on even single scratch on screen. I am using windows8.1 on this phone, and believe me, in last 5 years, it not hanged even single time.
this is made by operating system. in windows phone, u have not permission to go in system and make changes. 5 megapixels of camera provides u best resolution photoes. and u can capture videoes upto 720p hd. the camera reasult of this phone can impress u and made fall in love with this device. the only one thing can disappoint u that there is not front camera.