A No No when it comes to cell phones

I am a Samsung lover but decided to try apple once (a year ago). 6s is a basic phone, at the value of the latest Samsung with all possible up grades. Having two cell phone that was not a big deal but recently the phone started to freez when I am outside or when it is cold. It is just useless and I had to threw it out. I bout the phone a year ago, and am still angry at my purchase