Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
You should be able to reset or remove the pin on your phone, as long as you can login to your mcafee mobile security account.
So try to enter the info for your phone on this page https://www.mcafeemobilesecurity.com/forgot-pin.aspx
Let me know if you get st uck at any point, or if this helps you reset and remove your pin so you can access your phone.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.