help sm-g531f

SIM network PIN blocked. Enter SIM netwopk PUK.
what can i do?
Platform: Samsung Android
Selected port: COM1
Selected model: SM-G531F
Searching for a phone. Please wait…
ADB server killed.
Please, press "OK" button on the phone to allow USB debugging..
Phone found.
Firmware compiled date: Sat Jun 13 21:07:21 KST 2015
PDA version: G531FXXU1AOF7
CSC version: G531FPHN1AOF2
SW version: G531FXXU1AOF7
Phone IMEI: Unknown
Android version: 5.1.1 (LMY48B)

plz help