There are still three updates remaining on my lumia 520 which I last updated upto 8.1.12##### released on june 2/2014, now it shows that my phone is upto date where as when I checked online it shows that there have three newer updates since june 2/2014 and the latest update 8.1.14#### was released on August 19/2014. Please tell me why is this happening and why can't I update my Lumia 520 anymore?