debrand and unlock is of different thing, if you only debrand it, you wouldn;t be able to use vodafone but if you unlock it you'll be able to use any simcard.
For debranding, use the following files;
K770_R8BE001_MAIN_GENERIC_VI_RED53
K770_R8BE001_FS_EUROPE_4_RED53
HB1-06_Gen_CDA102864_13_R6A_GENERIC_EUROPE_4
Read here to flash CID53 phone : Flash K800 CID53 with K810 software CID53 (for begginers) - Top Sony Forums
Here to unlock patch using simox simlock remover patch : Patching CID53 (DB2020)DB2010,2012 - Top Sony Forums

Remove SIM-lock patch generator - Top Sony Forums