Sony Ericsson has built a motion sensor into its new Z555 mobile phone allowing users to silence the ringtone or snooze the alarm by waving a hand over it.

The Z555 is a clamshell phone with a 1.3-megapixel camera, FM radio, media player, expandable memory which features a diamond-patterned exterior. Also of note: the colours and designs of the phones themes can be set to automatically change throughout the year depending on the season.