I haven't used iTunes in years. I think the last time I backed up my phone was when I had an Iphone 12. I had the 14PM since and now just got the 16PM. What would happen if I tried to back up the 16PM? I'm trying to remember how itunes works. Would I back up as a new phone? I don't use Icloud. I take way too many photos for that. I just use google photos instead and delete the photos I no longer want off the phone.