what data does not sync when replacing iphone

eMail account settings don't backup. Data downloaded for some apps doesn't back up - I use a mapping app and downloaded tiles don't load onto a new phone. If you don't encrypt the backups then account and app passwords aren't backed up. Banking apps will load but you'll have to set them up again probably with a card reader (in the UK).

HOWEVER … the process is the same to replace a phone should yours be lost, damaged, or stolen. So in the spirit of being prepared …

Apple’s setup is really VERY good. If you simply use the iOS “defaults” - and keep your phone regularly charging on WiFi (to enable Automatic iCloud Backups) - all of your data will be either “backed-up” and/or “sync’d” to iCloud.

A replacement - or upgraded - phone will build itself into a near-clone of your prior phone. Even the screen icon arrangement is maintained.

It’s actually quite remarkable.

You WILL have to setup your Biometrics again as they are NEVER exported from ANY device; and you’ll need to re-verify any banking cards in your wallet.

But that’s really about it.

See:

What does iCloud back up? - Apple Support

How to back up your iPhone or iPad with iCloud - Apple Support

Most items in Apple Wallet will not sync including credit cards, debit cards, prepaid cards, gift cards, keys, boarding passes, tickets etc.

Most loyalty cards sync unless they double as a gift card too.

icarusinquiries wrote:

also bluetooth connections?? passwords??

If you get a new iPhone, you will need to pair Bluetooth devices to the new phone as that does come over in the transfer process. You'll need to know how to put any bluetooth devices you own into pairing mode per the manufacturers pairing instructions. Some passwords may need to be entered again, especially for some third party applications, but if you are syncing your passwords in iCloud, you'll be able to access them on the new phone from the Passwords app.

Who told you the IPhone 11 are about to be obsolete? It can still run the latest iOS and Apple has made no announcement of this.

A worker at the Apple store was trying to con you into purchasing a new phone, that's all.