Settings area
Device identity and setup
Work out exactly which iPhone you have, then get it set up properly.
About
AvailableAbout holds the Model Name, Model Number, serial number, IMEI and the iOS version your iPhone is running.
Settings > General > About
eSIM
Region dependentAn eSIM is a cellular plan stored in the phone itself, added by scanning a code or through a carrier app, with no tray to open.
Settings > Cellular > Add eSIM
Device Name
AvailableThe name at the top of About is what appears in AirDrop, Personal Hotspot, Bluetooth pairing and on other people's screens.
Settings > General > About > Name