s5300 unlocking in octopus [Reference]
insert usb cable to phone usb dubging hit direct unlock

Welcome to Octopus Box Samsung software version 1.5.3
-----------------------------------------------------------------------------------
Platform: Samsung Broadcom
Selected port: COM1
Selected model: GT-S5300
Connecting to phone on COM19
Detected phone model: GT-S5300
SW Version: S5300DXLC6/S5300OLBLC4/S5300DXLC4/S5300DXLC6
HW Version: GT-S5300ZKAGLB
Phone IMEI A: 351737-05-799724-1
Firmware compiled date: Thu Mar 22 13:30:31 KST 2012
Android version: 2.3.6 (GINGERBREAD)
Unlocking phone...
Phone is successfully unlocked
Please, restart phone to apply changes

Welcome to Octopus Box Samsung software version 1.5.3
-----------------------------------------------------------------------------------
Platform: Samsung Broadcom
Selected port: COM1
Selected model: GT-S5300
Connecting to phone on COM19
Detected phone model: GT-S5300
SW Version: S5300DXLC6/S5300OLBLC4/S5300DXLC4/S5300DXLC6
HW Version: GT-S5300ZKAGLB
Phone IMEI A: 351737-05-799724-1
Firmware compiled date: Thu Mar 22 13:30:31 KST 2012
Android version: 2.3.6 (GINGERBREAD)
Unlocking phone...
Phone is successfully unlocked
Please, restart phone to apply changes