[MagnetoX1]

My BB8330 Curve was fine this morning, but when I went to check it
(on my lunch break at work) all of a sudden it shows a white screen
with a symbol I've never seen before, beneath which is the number "552".
The symbol I will try to describe here: it looks like a white rectangle, with
a black strip across the top . Inside the rectangle are outlines of a circle,
square, and triangle. The rectangle is inside a larger circle with a diagonal
line across it going upward from left to right. I tried pulling the battery out,
and it starts to reboot, then this same image appears again. Does anyone
know what this means and how to correct it?? I should also add that the
phone has not been dropped nor has it been exposed to water, in case those
questions occur to anyone reading this.