In india iphone is only sold for fame and for status but in other countries it is sold for its hardware. I am too an iphone 6 ( 64gb) user.
Now lets talk about some specification: -
It has 1gb RAM, It comes five variants if you go for internal memory( ROM) 16, 32, 64, 128, 257( gb) , on the basis of colour there are four colour space grey, gold, rose gold, silver.
I have ios 10.2.1, but a new update is come which is 10.3.1.
Apps are too large as compare too windows and android. If you are going to download over 100mb then your required wifi to download it.
There is no 3d touching in iphone6 it come with iphone6s, But if you jail breaked it then all features unlocked which you get in iphone 6s.( Note: ~ do it your own risk because you lost the guarantee you got)
Thanks, hope you like it any query then ask in comment section below.