i was trying to do my own sms tone, i got it to work by following several step by step instructions online but i accidentally deleted 'received message.***' i dont remember the type of file it was. my question is, was that important to have? if not, then i'm not gonna try to figure out how to retrieve. my sms tone goes off, but once in awhile it wouldnt. jw if 'received message' file had to do anything with the problem.