How can I unlock my Galaxy Alpha, I can't unlock with fingerprint and I forgot password?

[AC Question]

Tried to get in with back-up password but I don't know it

 

[belodion]

Do you not have the option to use your Google account details?

Posted via the Android Central App

 

[Rukbat]

If Android Device Manager doesn't let you change it, bring the phone, along with a photo ID showing that you own the account the phone is activated on, to your carrier, and they can unlock it.