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Fifth- Reception, absolutely sick. I work in a hospital, deep down in surgery. My iPhone 4s, Skyrocket and Atrix routinely well, SUCK. Lost signal, even wifi random. The nokia Lumia 900 works well, very well. Great signal, receive texts, make calls and data. I dont have to stand on one foot, hold my mouth to the left and jump up and down as I do with the iPhone 4S.
Lastly- camera, it could be better for 8 MP, not nearly on par with others but the flash is good. I am hoping software updates can CRISP the images up some. Not concerned with speed, options, etc. They are all fairly good. Just make the pictures POP.
Overall, I am satisfied. Really enjoying windows phone and the lumia900. Will I keep, yes.