Nokia lumia 730 is my best mobile phone which I used until now, Its fast running smoothly but when you free min 1 gb from phone storage , if you have no space in phone memory then it give you problem like hang , slow apps opening and call drop problems but if you have more space in phone memory then its a best mobile , what a display in low brightness its give you light like a high bright on other mobile .its really a fantastic mobile phone but Microsoft Window app developer doesn’t work on apps because many of apps are not working properly But still I love lumia 730