password on my phone was changed without my knowledge how do i get it unlocked

[AC Question]

my phone is the Galaxy s4, password was changed without my knowledge how do I unlock it

 

[Tim1954]

Find the person who changed it, break their fingers one by one until they undo it.

 

[AlphaTango414]

Which password did they change? Just about 95% of passwords are recoverable via some kind of "forgotten password" link or alternative sign in.