Frozen phone

I have a motorola 100. Today, while I was typing a
message, it froze totally. On the keyboard, where
there should be letter M, there was a large circle
with a dot at the bottom and three dots under that.
No phone function worked, and it took several tries
to turn the phone off. I was then able to restart it.

I also tried sticking a paper clip into the small hole
at the top, which I thought is for a reset, but no good
there either.

What would do this?
-- 
db