I'm not planning to put iOS6 on the 3Gs, but will wait and see what others think. The 3Gs will be going to my mother, her first iPhone. She might need a new battery but it's mostly been a trouble free phone for me. I've had the occasional crash, maybe 5 in it's life. And sometimes the battery has run down too quick but right now lasts about 2 days with lite use.
How is iPhone 3GS for someone who has never used a smartphone. I am planning to buy one for my dad and he has always used the dumb phones. He has also never used touchscreen but i want to buy iPhone for him so he gets the great experience. He is not a power user at all. Since i am not 100% sure if he will adopt the iPhone, i am planning to get 3GS instead of 4/4S as it will come cheaper used and does not have that much glass as 4/4S so he can more comfortable with it.
Secondly i dont have to worry about cutting the SIM to make micro SIM etc and he can easily go back to his old phone incase he is uncomfortable with the iPhone.
PS: The phone is going to be used outside USA.