Terminology

Mobile phone terms
Cell phone or cellular telephone
Term used currently in the United States and during the 1980s to refer to most mobile phones. This term applies specifically to mobile phones which use a cellular network. In developing mobile phone technology, American electrical engineers saw the main technical problem as achieving a smooth handoff from one radio antenna to the next. After they gave the name "cell" to the zone covered by each antenna, it was a natural choice for them to apply the term "cellular" to both the technology and the phones that ran on it.
Clamshell
An unfolding oval shape resembling a shell
Handy
pronounced "Hendi", this is a pseudo-anglicism, derived from the term Handy Talkie for a handheld military radio, that is used in Germany for a mobile phone (rare alternative spelling: Händi). Similarly another pseudo-anglic term Hand phone is used in South Korea.
Mobile phone
A term covering cellular phones, satellite phones and any phones giving wide ranging mobility.
Mobile
Short form of the above, a term in everyday usage in some English speaking countries such as the UK.
Satellite phone
A mobile phone which communicates with a satellite rather than a land-based network.
Wireless phone
This is a term which is generally used to refer to a mobile phone although it could legitimately cover almost any phone which does not use a wire.
3G phone
A mobile phone which uses a 3G network.