The purpose of my phone is to communicate and keep myself up to date So I don’t need any fancy function for myself lol

Depends if I really like some new model or if there is an issue with my current phone

Once every 2 years? My phone normally gets a little wonky then

whenever my contract ends or when my phone's about to give up

It’s affordable to change as iPhone have high resale value.

Every 2 yrs in general- else hard to catch up re tech

Used to change every year, now maybe every 3-4 years

Actually every 2 years after contract expires

Whenever a new model comes into the market

I wait till something stops working haha