Strange start up on s5

Hi a have a old phone s5 I have lots of stuff on, still has a sim but rarely use it as a phone its off most of the time.
Last time inturned it on i had a very strange voicemail, basically trying to get me to press a digit.
After listening to the voice message, I turned of phone today when I turned it on instead of the normal start up .
I got a list of commands in green,red ,white writing like computer type.
About securerboot, udc ect ect
Has my phone been hacked connected to a computer?

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