How can I set it to continue alerting me that I have a message in my inbox? I receive a message and it sounds very softly; a nice sound, but if I am not in the same room I cannot hear it..I used to have a mobile that would keep alerting me every 3/5mins until I heard it and then you read the message and it stops alerting you. I am sure this mobile (5 years newer) can do so but dunno how to set it. Can any1 help?