Yes after 8 months with my 620 and 3 months with it on the 8.1 preview, I decided to get the galaxy ace 3 LTE. You are probably think Android sucks, soo much lag etc but the reality is that it depends on what you buy and how you use it. I did experience some lag when I was installing apps but when the installations finished, everything was smooth again. It's not that Windows Phone is rubbish, I changed because I don't think It's READY yet. The apps have been flowing but the key apps like vine and instagram haven't been updated in a while. Maybe this will change in the GDR2 or thereshold update where there will be more API's for devs to take advantage of but for now I'm on android where I can literally do anything I want with my phone. (And I mean ANYTHING)
Facebook
Twitter
Instagram