how do i unlock my S6 using a backup password if I did not set one up

[AC Question]

I initially used the thumbprint option to unlock the phone; however, it did not read my thumbprint properly several times in a row. Now, my phone is locked and I'm unable to use it at this time. I can only make "Emergency calls".

 

[STARGATE]

Use your Android administrator account.
Call Samsung, or take it to your carrier.