samsung d880 dual sim full flash & imei change

samsung d880 full flash & imei change & unlock step by step  with z3x box
1=select model d880m
2= firmware ending master
3=write firmware  & wait some time
4=total firmware flashing complete
now complete 1 section
go to model tab
1=select model d880
2=firmware ending  slave
3=write firmware  & wait some time
4=total firmware flashing complete

now complete 2 section
now total mobile completed flashing
now imei change time
go to  imei option  enter new imei & u see a box & tik it
go to    repair & click  custom & wait some time
go to model option change model to d880 m &  enter new imei & u see a box & tik it
go to    repair & click  custom & wait some time
total complete after  click direct unlock
d880m  show any error don't worry go to model tab & change d880s  & go to click  direct unlock
then power on mobile with out sim & enter this code *2767*3855#