Other

There are new headphones which are similar to those of current iPods, but which incorporate a microphone. Calls can be answered and ended by squeezing a bud, toggling the microphone. The 3.5 mm TRS connector for the headphones is located on the top left corner (as seen from front upright). Wireless earpieces that use Bluetooth technology to communicate with the iPhone are sold separately. The headphone jack is recessed and as a result many standard earpieces require an adapter to work correctly.
The loudspeaker is used both for handsfree operations and media playback.
The SIM card is located in a slot at the top of the device,[2] and the device is activated through iTunes.[30]
iPhone lacks a number of other handheld features that have not already been mentioned, including voice dialing, voice recording, instant messaging, memory card slot, MMS, A2DP (allowing for stereo sound to be sent to an audio device by Bluetooth), common Bluetooth file transfer, GPS capability, text copy and paste, native games, and support for MP3 files as ringtones