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GSMulti v3.0 + USB Map v1.7

Download firmware

Step by Step

Download & Extract LG GW300 Flasher
Execute / Install SETUP_GSMULTI_V30, and then C:\GSMULTI folder will be created
Find MultiGSM_V30.exe on C:\GSMULTI folder, then right click, send to desktop
Execute / Install Setup_USB_PortMapping_04.exe, and the result will be stored in C:\GSMULTI\UsbDrivers\MTK
Connect phone ( in power off condition ) to PC via Usb data cable, wait until detected by PC
When PC asking for driver, go to C:\GSMULTI\UsbDrivers\MTK, wait until driver installed
Open MultiGSM_V30.exe ( at desktop ), go to Tab Setting ==> Configuration. For DLL, choose GW300_090625.dll at LG GW300 Flasher folder, for S/W file choose LG GW300 Firmware. For other setting don't changed
Final step.., just click on START button and wait untill all process done / pass.