The feature originally required a Wi-Fi network, but now[when?] can use the cellular data network if one is not available.
The iPhone includes software that allows the user to upload, view, and email photos taken with the camera.
The user zooms in and out of photos by sliding two fingers further apart or closer together, much like Safari.
The Camera application also lets users view the camera roll, the pictures that have been taken with the iPhone's camera.
Those pictures are also available in the Photos application, along with any transferred from i Photo or Aperture on a Mac, or Photoshop on a Windows PC.
Multimedia
The layout of the music library is similar to that of an iPod or current Symbian S60 phones.
The iPhone can sort its media library by songs, artists, albums, videos, playlists, genres, composers, podcasts, audiobooks, and compilations. Options are always presented alphabetically, except in playlists, which retain their order from iTunes.
The iPhone uses a large view that allows users plenty of room to touch their selection.
Users can rotate their device horizontally to landscape mode to access Cover Flow.
Like on iTunes, this feature shows the different album covers in a scroll-through photo library.
Scrolling is achieved by swiping a finger across the screen.
Alternatively, headset controls can be used to pause, play, skip, and repeat tracks. On the iPhone 3GS, the volume can be changed with the included Apple Earphones, and the Voice Control feature can be used to identify a track, play music songs in a playlist or by a specific artist, or create a Genius playlist.
The iPhone supports gap less playback.
Like the fifth-generation iPods introduced in 2005, the iPhone can play digital video, allowing users to watch TV shows and movies in widescreen. Double-tapping switches between widescreen and full screen video playback.
The iPhone allows users to purchase and download songs from the iTunes Store directly to their iPhone.
