Just bought the missus an update for her S2. We're in Korea, so went for the best option (pretty cheap at 22,800 baht).
The best screen.
The fastest processor.
Great front and back cameras.
&, data rates of 225 mbps!
LG G3 Cat.6 With 5.5-Inch QHD Display, Snapdragon 805 Launched | NDTV Gadgets
cost 2000 baht per month for 5GB data and unlimited calls and texts and wifi hotspots.