Not sure if this is a common problem or not, but I just realized today that out of nowhere, things would start deleting itself on my Blackberry. The only things I have noticed which automatically deleted were: call history, active conversations in Messenger, and many emails.
The only reason I can come up with is that I've been using too much memory (I don't have a memory card inserted) and thus it automatically deleted some things. I've since deleted many of my pictures and old emails but I don't know if this has resolved the issue as of yet.
If I could get some input that would be great! Thanks in advance