Security experts have devised a system which triggers a high-pitched screech on a mobile phone if it is stolen. The service is also designed to prevent thieves from using stolen phones and accessing the data contained on them. Under the new system, Remote XT, a signal is sent to the mobile once it is reported lost or stolen, causing it to emit an alarm similar to a scream. The service is backed by the Mobile Industry Crime Action Forum and is aimed at businessmen and women. The alarm noise is accompanied by a message, reading “This phone is stolen”.