Signalling that manufacturers no longer see voice as the killer application for mobile phones, the latest handsets being showcased at CeBIT this year are loaded with extra and, in some cases, unusual functionality.

Samsung believes that imaging is the way to go and has managed to fit a 7-megapixel video and stills camera into its new SCH-V770 phone. The company was the first to build a 5-megapixel cameraphone, launched at CeBIT last year.

Nokia seems to agree. Its newly unveiled 6680 smartphone has two cameras and a flash as well as software called XpressPrint, which allows users to print photos on compatible printers and at photo-booths in camera shops.

Other manufacturers see sound as the way forward. Alcatel's latest range boasts strong audio technology, with 2:1 stereo in one case.

Siemens has gone a step further with its Mobile Music set, a pair of folding speakers with a docking station so that users can play music or listen to the radio without a cricked neck or headset.

As for accessories, GPS technology is being integrated by manufacturers but does not appear to be taking off too quickly.

The Siemens SXG75 has GPS built in, and PalmOne has signed a deal with TomTom to build a new in-car navigation system called, unsurprisingly, GPS Navigator.

But the oddest application seen at the Hanover trade show so far this year comes from Sony Ericsson. It is a rolling robot camera controlled via Bluetooth from the mobile phone.

The ROB-1 is a two-wheeled spherical robot the size of a grapefruit with third back wheel for stabilisation. It will be available in the autumn priced around £250.