(1) Short for Information and Content Exchange.
(2) Short for in-circuit emulator.
(3) Short for Incase of Emergency, in mobile phone terminology ICE refers to a concept conceived by Cambridge paramedic Bob Brotchie, and it refers to using the acronym ICE in front of your designated emergency contact in your cell phone address book. It is also recommended that if your ICE contact is deaf, the acronym ICETEXT should be used to identify your ICE contact in your cellphone contact list.
See also "The Difference Between a Cell Phone, Smartphone and PDA" in the "Did You Know..." section of Webopedia.