How can users access the 'Settings' app on an iPhone?

Tapping the gear icon on the home screen is a direct way to access the 'Settings' app on an iPhone. The gear icon is universally recognized as the representation of settings across various platforms, suggesting functionality related to configuration and adjustments. This makes it an intuitive choice for users looking to manage their device's preferences, connectivity, and general settings.

While there are other methods to access the 'Settings' app, such as using Siri to open it, or swiping to find the application, tapping the gear icon provides the most straightforward and immediate access for the user. Holding down the power button is primarily used for locking the device or accessing power options, which does not provide access to the 'Settings' app itself.