Frozeo phone

I have a motorola g100. 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?

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