Samsung has released invitations for an October 11th event that teases a new Galaxy device and the cryptic message "4x fun," CNET reports. What that could mean is really anybody's guess, but there are some rumors circulating that may give us a clue. Samsung Mobile CEO DJ Koh said earlier this month that it was "time to deliver" on the company's long-awaited foldable smartphone, but he mentioned it could be unveiled -- emphasis on could -- at the Samsung Developer Conference in November. Another possibility could center on cameras. Leaker Ice Universe tweeted last week, "Samsung Camera Camera Camera Camera," later noting all four would be on the back.