I am using Nokia Lumia 520 and its OS is awesome and I feel that some of the features of Windows OS are very good.
If you use your mail very frequently then this is the best phone, phone mailing function is inbuilt and you don’t have to bother about net, whenever you are connected with any wifi or data connection then it automatically sync and download all its mail except its attachment. Attachments are excluded because many mails have viruses in its attachment.
OS updates only on wifi which means you don’t have to bother about you balance cut.
Its look is simply good. Everyone luv this phone.
Some disappointments
Background download doesn’t perform
Many apps are missing