The Galaxy S3 from Telus is already running Android 4.1.2 Jelly Bean. If you mean Android 4.2.2 Jelly bean, nobody knows as the international version will have to get it first and hasn't yet which happens months before any carrier branded models get...
I guess everyone here either doesn't have the phone or are not gamers because I have a review HTC ONE HTC sent me to do a review and I found a big performance issue with the very first day I had it. The device works great unless you are playing graph...
You can also check out skins that sick on the device front and back so you can not only make it whatever color you want but patterns, sketches, ect. Hers some here http://www.decalgirl.com/skins/Samsung-Galaxy-S4-Skins