Have you updated to the most recent software?
I also have a 6S that I won't be replacing this year. I am just going to get the battery replaced.
I read that the phone's performance also increases when you get a new battery, so mine should be good for another year or so after I get the battery replaced.
I hope your problem gets sorted out! Best of luck!
I just did that yesterday, in the hopes of getting the problem sorted. It is a known problem with Apple and the newes ios update was said to have solved it... I guess just now for me.
I got the battery replaced a few days prior so I guess it's an entirely different problem. We'll see.
So good to hear you will keep your 6s for at leasr anotger year! How old is it now?
It's about 2 years old.
Glad to hear it is still going strong, apart from the battery ;)