Why doesn't my screen unlock with my PIN?

[AC Question]

I cannot get past the blank screen that says try again, no matter how many times. I actually was prompted to change the screen pass code 1-2 days ago due to my work outlook account, but I thought it seemed like a reasonable amount of time to do that. I changed the battery tonight, and cannot get into the phone at all. Except for emergency call...which I don't want to do? What is my next step? I have already restarted and have powered off and on. Nothing makes a difference.

 

[belodion]

Try logging in to your Google account on a PC and change your device security details from there.

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