When you download a file on an iPhone, it is typically saved in the 'Downloads' folder within the app that you used to download it. However, the exact location of the downloaded file can vary depending on the app and the type of file that you are downloading.The most common app for downloading files on an iPhone is Safari. When you download a file using Safari, it will typically be saved in the 'Downloads' folder within the app. To access this folder, open Safari and tap the 'Bookmarks' button at the bottom of the screen. Then, tap 'Downloads' to view the files that you have downloaded.Another app that is commonly used for downloading files on an iPhone is the Mail app. When you download an attachment from an email, it will typically be saved in the 'Downloads' folder within the Mail app. To access this folder, open the Mail app and tap the 'Downloads' button at the bottom of the screen.If you have downloaded a file using a third-party app, such as Dropbox or Google Drive, the file will typically be saved in the app's local storage. To access the file, open the app and navigate to the 'Downloads' or 'Files' section of the app.It's also worth noting that if you're looking for downloaded files on your iPhone, you can also use the 'Files' app, which is a built-in app on your iPhone. You can access it by tapping on the 'Files' app on your home screen. The app allows you to view and manage files across all your cloud services, including iCloud Drive, iCloud, Dropbox, Google Drive, and other third-party services.In conclusion, when you download a file on an iPhone, it is typically saved in the 'Downloads' folder within the app that you used to download it, but the location can vary depending on the app and the type of file. The most common app for downloading files on an iPhone is Safari, but the Mail app and third-party apps such as Dropbox or Google Drive are also commonly used. The files app is also a good alternative to find the downloaded files on your iPhone.