SPH W8300 Direct Unlock [Reference]
Follow software instructions:
Connect powered-on phone to PC via KH4500 cable
Install necessary driver
First Read NVM for safety
press 4 and power button (For Download Mode)
Then Click "Unlock" button
Welcome to Octopus Box Samsung software version 1.7.8
-----------------------------------------------------------------------------------
Platform: Samsung Anycall
Selected port: COM155
Selected model: SPH-W8300
Detected phone model: SPH-W8300
Mode: Emergency
Unlocking phone...
Detecting firmware type
Searching for signatures...
Reading NAND...
Writing NAND
Phone is successfully unlocked

hit the thanks button first direct unlock here!
Connect powered-on phone to PC via KH4500 cable
Install necessary driver
First Read NVM for safety
press 4 and power button (For Download Mode)
Then Click "Unlock" button
Welcome to Octopus Box Samsung software version 1.7.8
-----------------------------------------------------------------------------------
Platform: Samsung Anycall
Selected port: COM155
Selected model: SPH-W8300
Detected phone model: SPH-W8300
Mode: Emergency
Unlocking phone...
Detecting firmware type
Searching for signatures...
Reading NAND...
Writing NAND
Phone is successfully unlocked

hit the thanks button first direct unlock here!