I actually purchased a new 1320 with gdr 3 and black out of box before that I had 720 with gdr3 preview on..while setting up 1320 I again signed up for that preview program and did the ota update...so basically now I have preview version of the os then the actual release one on my new phone...am I just stupid ??? or this preview program can help me get that 8.1 early ???how can I go back to the actual release version ??should I go back or continue with it ?? is it just a number change or there are real differences ?I am not a developer just an average user...