My 6s Plus lasted for 4 years before I got my 11 Pro Max which is my current phone. I would have kept the 6s Plus for longer but the issues with it kept stacking up (bad battery even with a replacement, camera making clicking sounds and not focusing, constant app crashing, headphone jack being very touch-and-go, and much more) so eventually I had to pull the plug and get this thing. I'll probably keep this current phone until it hits the 4 year mark as well just for consistency.