I've usually only gotten a new one once the previous one becomes unusable (or close enough to it), but my previous phone was missing enough features (or, well, mostly just NFC) that I took the opportunity to get a replacement paid for by my workplace after just over two and a half years.

Tend to make it 2-3 years. I wanted to make my Pixel 2 XL last 3 years but one bodged battery replacement later...

Maybe every 4.5 years, when the current one can't keep its battery charged or stops working for some other reason. Although, last time I got a new phone it was because the previous one was stolen because I forgot it at work, and couldn't get it back.

Every 3-4 years. My first two were iPhones (4s and 6). They used to belong to my brother, and I bought them from him when his contracts for them ended. The first smartphone I bought new (my 3rd and current one), is the Samsung Galaxy A50. I bought it because the battery in my iPhone 6 was fucked and there were new apps and games that it couldn't run. I don't miss having an iPhone.

I still have the same one from 2011

maybe once every two to three years ... pretty much whenever I feel like my current one just doesn't do it anymore (e.g. due to battery concerns or whatever)

I never owned a smartphone. Sister bought one not long ago for 700€.

I used to every year, but I bought a Pixel 3 almost two years ago and probably not going to switch in the immediate future unless it breaks... just don't really care anymore - now I'll never get my tech podcast going 😢

Typically every two years because that was when they started to malfunction. But I used to own iPhones and we now know this was by design. I have no intention of "upgrading" till my current phone stops working.

My phone is three years old. I have no need for a new one since I do not use it to compare dick sizes with my peers.

I own an iPhone 6. And I'm only now thinking of getting an upgrade because its too old to download some apps now.