Tap General at the top of the list. The new name will immediately appear on your Home screen, in settings, and when you sync with iTunes or Finder on a computer.
Change Phone Name for Seamless Connectivity
How to Rename an iPhone On an iPhone, the device name is tied to your Apple ID and appears across services such as iCloud, Find My, and AirDrop. What the New Name Appears On After you rename your device, the updated name shows up in several places automatically.
If you use multiple devices, the new label makes it easier to distinguish your primary phone from tablets, laptops, or other gadgets. Select About near the top of the screen.
Change Phone Name for Seamless Connectivity
Type the new name you want to use. Enter a new name using the keyboard and tap Done on the screen.
More About How do i rename my phone
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