Well I am using Nokia lumia 900 from last few years basically it was not lunched in India.It was going to gifted by my friend to me in 2013 it was unlocked version of Nokia lumia 900.
I will not talk about the specification of the phone because you can find it on net. Main reason Why I like this phone is Camera with dual flash and clarity of images is just awesome you don't feel that it was taken by just 8 mp camera because lumia 900 8 MP camera has Carl zeiss Optics with dual flash which help to take a good images in low light.
Second thing which is best with this phone in 2013 there is are few phones which comes with gorilla Glass. But I got few scratches on my screen also.
512 MB ram is sufficient Ram for use well now Microsoft has stop giving update it has Windows 7 and unsupported windows 8
Battery backup of this phone is just ok 5 to 6 hours only when I was using in 2013 now it hardly give 2 hours.
It support 4G but not indian Brands it support USA brands over all phone is ok for normal use and for clicking pics
