When apple put s behind the current model than generally they do not change much in phone.here also 6s is not much changed from iphone 6. Let me start the review by telling that if you have iphone 6 then you do not really need to upgrade to 6s.now if you are looking for good smart phone and have a good budget then definitely you can go for 6s.
It is very nicely designed phone, size is same as 6 and now available in 1 more color, rose gold.sound reception is excellent. This time they used more stronger aluminium to prevent bandgate.
It is ios based phone and so very easy to use.available in 16, 64 and 128 gb, it is advisable to purchase 64 gb.Battery is very poor and need to improve.camera is excellent. Now 3d touch is available which is not very much useful. Live photo option is also included in 6s. I am very much happy with the smooth performance of phone. Very much reliable and good value lf money.