If you forgot your pattern lock/password
1. Enter a wrong password/pattern lock until your phone block
2. Now your phone will ask you to log-in/sign-in to your google account to unlock your phone
if your forgot your google account loging in details' go to your google search engine and type in " recover google account"
4. If you naver link your phone with google then you will have to hard reset your phone to factory default
follow the instructions on the link below to hard reset your phone