GD-55 Unlocking Problem
 

Hi,i have GD-55 Vodafone locked.I have tryed all calculated codes on it.but all in vain.after that now i have flashed it with version GD55A11.rel sucessfully.but after inserting SIM in it..............phone still standing on Searching......not going onwards
what will be the problem here
1-Is there software confilict... because before flashing it has vodafone S/W in it.
2- Is there need to unlocked it, with any other software except codes after flash.
Please share your experience.Thanks