G928F Unable to unlock

Gathering phone info…
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G928F
Sales Code: DBT
Country Code: Germany
Android Version: 5.1.1 [LMY47X]
Build Date: Mon Dec 7 16:12:45 KST 2015
PDA Version: G928FXXU2AOL2 [december 2015, rev2]
Phone Version: G928FXXU2AOL2 [december 2015, rev2]
CSC Version: G928FDBT2AOL1 [december 2015, rev1]
Board Platform: EXYNOS5
Modem Platform: SHANNON333
Serial Number: RF8GB07DZLP
Imei: 354750073156582
Battery Status: 4.34V (100%)
SIM Status: NOT_READY
Knox Version: v30
Warranty Bit: 1

Unlocking…
Reading and storing secure image. Be patient! Do NOT disconnect the phone!
Checking secure image.
Preparing.
Calculating. Be patient! Do NOT disconnect the phone!
Unable to unlock.
Finished at local time: [๑๒.๒๑.๑๕ ๒๓:๒๒:๔๕]
WorkID: 8421293

what i wrong plz help