My phone has frozen up and I can't unlock my phone, how can I get into it?

[AC Question]

My phone has frozen up and cant unlcok my phone

When I powered my device on and trys to put in my pin in, its like its frozen and nothing pops up

 

[B. Diddy]

Re: My phone has frozen up and cant unlcok my phone

Welcome to Android Central! Which phone? Where does it freeze? At the PIN entry screen? Does the homescreen ever show up?