-Turn ON the phone
-enter qualcomm mode by entering *#782872# (*#786872# for Samsung mode)
-open 3g samsung tool
-connect the phone with e210 cable (both UART and USB)
-select port *qualcomm Diagnostics...
-press unlock ...
-you are done
Selected model: F480
Selected port: COM53 Qualcomm Diagnostics Interface 3197
Selected port speed: 115200
Reading phone info... OK
Model: SGH-F480
Country code: ½½·Î¹ÙÅ°¾Æ
Cal date: 2009-01-23
Factory SW: F480XXHL3
Unique number: 8082*********
Memory phone: KBN00700AM(F480)
Phone S/N: RVO*******
Reading IMEI... OK
IMEI: 354***********
Build: M6281A-KLRZ-4.0.9535
Reading sysinfo... OK
Calculating... OK
Writing sysinfo... OK
Reseting...
Unlock done
Done with Samsung Tool v.18.3