If you are looking for a mobile phone that can act as a personal attack alarm then probably your best bet it to opt for the Samsung SPH-W7100 handset as it emits an ear piercing 100dBs.
The Samsung SPH-W7100’s 100db alarm siren is linked to your local emergency services and also incorporates GPS so the authorities and grab your GPS coordinates to send help when needed.
The 100db Samsung SPH-W7100 is to be marketed towards Korean women and children when it gets launched next month, and no doubt if a success Samsung will offer the handset to markets elsewhere as well.
Source — Engadget