Vesper's SMS alert
The Sony Ericsson M600i (in chrystal white color) is the mobile phone used by Vesper (Eva Green) in the James Bond film Casino Royale.
In one of the last scenes the SMS sound can be heard and Bond picks up the phone and reads a message that suddenly makes him understand the real intentions of his Bond-girl.
Click to listen to the ringtone.
Thanks to Adam for the alert