This guide helps you get started using iPhone and discover all the amazing things it can do with iOS18, which is compatible with the following models:
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Your features and apps may vary depending on your iPhone model, region, language, and carrier. To find out which features are supported in your region, see the iOS and iPadOS Feature Availability website.
Note: Apps and services that send or receive data over a cellular network, or that answer incoming calls, may incur additional fees. Contact your carrier for information about your service plan and fees.
Identify your iPhone model and iOS version
Go to Settings 
> General> About. See Get information about your iPhone.
To determine your iPhone model from the physical details, see the Apple Support article Identify your iPhone model.
Get iOS updates
To update your iPhone to the latest iOS software compatible with your model, go to Settings > General> Software Update. See Update iOS on iPhone.
