I have a Samsung Ativ. Many good features - but was told when I bought it almost 2 years ago that it would soon upgrade to Windows 8.1. So far not available in Canada. I am now getting up to 40 duplicate pictures on my Camera Roll - as well as on my XBox Music. This morning I attached my phone to my computer - and copied and deleted all photos. When plugged into my computer - it reads 0 files on SD card for photos. When looking on my phone - still have up to 36 copies of some pictures. Music the same - try to play a playlist and think that it is hanging up on one song - check and that song has been duplicated with no rhyme or reason. I'm looking forward to the end of my contract and the end of my Windows phone.