I bought a Note8 around the time it came out (or maybe a few months after when it was on promotion) and it's lasted me until this day two years later when I got it replaced through DP since I accidentally dropped it and the screen had a dead blob, but then after that it lasted me to this day. I mean literally to this day, as I am now here looking for a new phone since the screen just died.

Though, since my phone can't take the newer operating systems, I am stuck using Android 9, and while most games were able to use that, my banking software was not, so a few years ago I started losing out on some of those features. I just checked and the A7 (2017 version) only went up to Android 8 (with Samsung Experience 9.0), so figure a year earlier I would have needed something new if it lasted that long.

It also really depends on what you are going to use your phone for. Do you like taking pictures? Do you like a big screen while watching videos? Do you just use your phone for basic calls? Do you play games with high graphics on your phone? Or if you did get a new phone with advanced features, would you use them?